Lach B, Benoit BG. Myofibroblastic sarcoma in meningioma: A new variant of “metaplastic” meningioma. Ultrastructural Pathology. 2007;31(5): 357--363.
There were three references where the first author's name was spelled incorrectly (online edition only), as “Eiden” rather than “Eyden” (see references 15, 16, 17). Consequently, efforts to retrieve these through interlibrary loan, or PubMed, may be unsuccessful.
Eyden B. The myofibroblast: An assessment of controversial issue of definition in diagnosis and research. Ultrastruct Pathol. 2001;25:39–50.
Eyden BP, Ponting J, Davies H, et al. Defining the myofibroblast: Normal tissues with special reference to the stromal cells of Warton's jelly in human umbilical cord. J Submicroscopic Cytol Pathol. 1994;26:347–355.
Eyden B. Fibroblast phenotype plasticity: Relevance for understanding heterogeneity in “fibroblastic” tumours. Ultrastruct Pathol. 2004;28:307–319.