Acknowledgements
This work was supported by Stefan Morsch Stiftung (Germany); Monika Kutzner Stiftung (Germany); the German Academic Exchange Service (DAAD) (BRA 07/039); CAPES (project no. 301/08); Pro-Vita non-profit organization; CNPq and FAPERJ (project no. E-26/110:899/2009); the International Outreach Program and the American Lebanese Syrian Associated Charities (ALSAC), St. Jude Children's Research Hospital (Memphis, TN); and a Center of Excellence Grant, State of Tennessee.
Potential conflict of interest:
Disclosure forms provided by the authors are available with the full text of this article at www.informahealthcare.com/lal.