We, the Editors and Publishers of Expert Opinion on Pharmacotherapy note we have had cause to revisit the nine articles listed below, post-publication, and the significant similarity in the text between these articles and other previously published articles has been identified as an issue of concern.
The nine Expert Opinion on Pharmacotherapy articles are listed below, followed by corresponding references to the published articles which have the highestlevel of similarity. We note that many of these published articles have been cited and referenced, however appropriate acknowledgement for the high extent of overlap was not given and could be misleading to the reader as being original.
For the first two articles [1,2] we note the corresponding author, G Derosa, has submitted Corrigenda.
Derosa G, Carbone A, D’Angelo A, Querci F, Fogari E, Cicero AF, Maffioli P. A randomized, double-blind, placebo-controlled trial evaluating sitagliptin action on insulin resistance parameters and β-cell function. Expert Opin Pharmacother 13 (17), 2433–2442. 2012.
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Significant similarity and text overlap observed in the Materials and Methods, Results and Discussion sections in [1] with the below article:
Giuseppe Derosa, Anna Carbone, Ivano Franzetti, Fabrizio Querci, Elena Fogari, Lucio Bianchi, Aldo Bonaventura, Davide Romano, Arrigo F.G. Cicero, Pamela Maffioli. Effects of a combination of sitagliptin plus metformin vs metformin monotherapy on glycemic control, β-cell function and insulin resistance in type 2 diabetic patients. Diabetes Research and Clinical Practice 2012 98 (1) 51–60
2. Derosa G, Ragonesi PD, Carbone A, Fogari E, D’Angelo A, Cicero AF, Maffioli P. Vildagliptin action on some adipocytokine levels in type 2 diabetic patients: a 12-month, placebo controlled study Expert Opin Pharmacother. 2012 Dec;13(18):2581–91.
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Significant similarity and text overlap observed in the Materials and Methods section in [2] with the below article:
Giuseppe Derosa, Anna Carbone, Ivano Franzetti, Fabrizio Querci, Elena Fogari, Lucio Bianchi, Aldo Bonaventura, Davide Romano, Arrigo F.G. Cicero, Pamela Maffioli. Effects of a combination of sitagliptin plus metformin vs metformin monotherapy on glycemic control, β-cell function and insulin resistance in type 2 diabetic patients. Diabetes Research and Clinical Practice 2012 98 (1) 51–60.
3. Fogari R1, Zoppi A, Mugellini A, Maffioli P, Lazzari P, Monti C, Derosa G.. Effect of aliskiren addition to amlodipine on ankle edema in hypertensive patients: a three-way crossover study. Expert Opin Pharmacother. 2011 Jun;12(9):1351-8.
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Significant similarity and text overlap observed in the Materials and Methods section in [3] with the below articles:
R Fogari, GD Malamani, A Zoppi, A Mugellini, A Rinaldi, A Vanasia and P Preti. Effect of benazepril addition to amlodipine on ankle oedema and subcutaneous tissue pressure in hypertensive patients. Journal of Human Hypertension (2003) 17, 207–212. doi:10.1038/sj.jhh.1001533
R Fogari, A Zoppi1, G Derosa, A Mugellini, P Lazzari, A Rinaldi, E Fogari and P Preti. Effect of valsartan addition to amlodipine on ankle oedema and subcutaneous tissue pressure in hypertensive patients Journal of Human Hypertension (2007) 21, 220–224. doi:10.1038/sj.jhh.1002140; published online 11 January 2007
4. Fogari R1, Zoppi A, Maffioli P, Lazzari P, Mugellini A, Derosa G. Effect of telmisartan addition to amlodipine on ankle edema development in treating hypertensive patients. Expert Opin Pharmacother. 2011 Nov;12(16):2441–8.
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Significant similarity and text overlap observed in the Patients and Methods and Results sections in [4] with the below articles:
R Fogari, A Zoppi1, G Derosa, A Mugellini, P Lazzari, A Rinaldi, E Fogari and P Preti. Effect of valsartan addition to amlodipine on ankle oedema and subcutaneous tissue pressure in hypertensive patients Journal of Human Hypertension (2007) 21, 220–224.
R Fogari, GD Malamani, A Zoppi, A Mugellini, A Rinaldi, A Vanasia and P Preti. Effect of benazepril addition to amlodipine on ankle oedema and subcutaneous tissue pressure in hypertensive patients. Journal of Human Hypertension (2003) 17, 207–212. doi:10.1038/sj.jhh.1001533
5. Derosa G, Maffioli P, D’Angelo A, Salvadeo SA, Ferrari I, Fogari E, Gravina A, Mereu R, Randazzo S, Cicero AF. Effects of long chain ω-3 fatty acids on metalloproteinases and their inhibitors in combined dyslipidemia patients. Expert Opin Pharmacother. 2009 Jun;10(8):1239–47.
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Significant similarity and text overlap observed in the Materials and Methods section in [5] with the below article:
G. Derosa, A. D’Angelo, C. Tinelli, E. Devangelio, A. Consoli, R. Miccoli, G. Penno, S. Del Prato, S. Paniga, A.F.G. Cicero. Evaluation of metalloproteinase 2 and 9 levels and their inhibitors in diabetic and healthy subjects. Diabetes & Metabolism 2007 33 (2) Pages 129–134.
6. Fogari R, Zoppi A, Mugellini A, Preti P, Perrone T, Maffioli P, Derosa G. Effects of valsartan versus olmesartan addition to amlodipine/hydrochlorothiazide combination in treating stage 2 hypertensive patients. Expert Opin Pharmacother. 2012 Apr;13(5):629–36.
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Significant similarity and text overlap observed in the Results section in [6] with the below article:
R. FogariA. ZoppiA. MugelliniP. PretiM. DestroA. RinaldiG. Derosa. Hydrochlorothiazide added to valsartan is more effecttive than when added to olmesartan in reducing blood pressure in moderately hypertensive patients inadequately controlled by monotherapy. Advances in Therapy. 2006, (23) 5, pp 680–695.
7. Fogari R, Zoppi A, Mugellini A, Maffioli P, Preti P, Derosa G. Effects of valsartan or ramipril addition to amlodipine/hydrochlorothiazide combination on left ventricular mass in diabetic hypertensive patients with left ventricular hypertrophy. Expert Opin Pharmacother. 2012 Jun;13(8):1091–9.
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A patchwork of overlap with lots of other published articles was observed in this article [7].
8. Derosa G, Maffioli P, Salvadeo SA, Ferrari I, Gravina A, Mereu R, D’Angelo A, Fogari E, Palumbo I, Randazzo S, Cicero AF. Comparison of orlistat treatment and placebo in obese type 2 diabetic patients. Expert Opin Pharmacother. 2010 Aug;11(12):1971–82.
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A patchwork of overlap with lots of other published articles was observed in this article [8].
9. Fogari R, Mugellini A, Zoppi A, Preti P, Maffioli P, Perrone T, Derosa G. Time course of antiproteinuric effect of aliskiren in arterial hypertension associated with type 2 diabetes and microalbuminuria. Expert Opin Pharmacother. 2013 Mar;14(4):371–84.
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Significant similarity and text overlap observed in the Methods section in [9] with the below article which has not been referenced:
Roberto Fogari, Luca Corradi, Annalisa Zoppi, Pierangelo Lazzari, Amedeo Mugellini, Paola Preti, Andrea Rinaldi. Addition of Manidipine Improves the Antiproteinuric Effect of Candesartan in Hypertensive Patients With Type II Diabetes and Microalbuminuria. American Journal of Hypertension, Volume 20, Issue 10, 1 October 2007, Pages 1092–1096.