1. Postgraduate Program in Gynecology and Obstetrics, Federal University of Rio Grande do Sul. , Rua Ramiro Barcelos, no. 2400 2° floor, Porto Alegre 90035003, RS, Brazil
2. Division of Breast Surgery , Hospital de Clinicas de Porto Alegre, , Rua Ramiro Barcelos no. 2350, room 600, Porto Alegre 90035003, RS, Brazil
3. Federal University of Rio Grande do Sul , Hospital de Clinicas de Porto Alegre, , Rua Ramiro Barcelos no. 2350, room 600, Porto Alegre 90035003, RS, Brazil