[1] Univ Estadual Paulista, UNESP, Sao Paulo State Univ, Dept Dermatol & Radiotherapy,Botucatu Med Sch, Av Prof Mario Rubens Guimaraes Montenegro S-N, BR-18618687 Botucatu, SP, Brazil
[2] Univ Estadual Paulista, UNESP, Sao Paulo State Univ, Dept Obstet & Gynecol,Botucatu Med Sch, Botucatu, SP, Brazil
[3] St Josephs Healthcare, Biostat Unit, Father Sean OSullivan Res Ctr, Hamilton, ON, Canada
[4] McMaster Univ, Dept Hlth Res Methods Evidence & Impact, Hamilton, ON, Canada