1. Nursing School University of São Paulo (USP) São Paulo Sao Paulo Brazil
2. São Paulo State University Julio de Mesquita Filho (Unesp) ‐ Botucatu Medical School undergraduate student of medicine Botucatu Sao Paulo Brazil
3. Department of Gynecology and Obstetrics, Botucatu Medical School São Paulo State University Julio de Mesquita Filho (Unesp) Botucatu Sao Paulo Brazil
4. Department of Dermatology and Radiotherapy, Botucatu Medical School São Paulo State University Julio de Mesquita Filho (Unesp) Botucatu Sao Paulo Brazil
5. Department of Clinical Epidemiology & Biostatistics McMaster University Hamilton Ontario Canada
6. Biostatistics Unit, Father Sean O'Sullivan Research Centre St Joseph's Healthcare Hamilton Ontario Canada