Published on in Vol 6 , No 1 (2017) :January

1 Cancer Control and Prevention Group , Institut d’Investigació Biomèdica de Bellvitge-IDIBELL , L’Hospitalet de Llobregat , ES
2 Universitat Internacional de Catalunya , Medicine and Health Sciences School , Sant Cugat del Vallés , ES
3 Institut Català d’Oncologia-ICO , Tobacco Control Unit, Cancer Control and Prevention Programme , L'Hospitalet del Llobregat , ES
4 Institut Català d’Oncologia-ICO , Training Unit , L’Hospitalet de Llobregat , ES
5 Institut Català d’Oncologia-ICO , Tobacco Control Unit, Cancer Control and Prevention Programme , L’Hospitalet de Llobregat , ES
6 Management Department , Instituto Oncologico del Oriente Boliviano de Santa Cruz de la Sierra , Santa Cruz de la Sierra , BO
7 Public Health Department , Ministerio de Salud y Pública y Bienestar Social , Asuncion , PY
8 Radiation Oncology Department , Instituto de Cancerología y Hospital Dr. Bernardo , Guatemala , GT
9 School of Medicine , Department of Clinical Sciences , Universitat de Barcelona , L'Hospitalet del Llobregat , ES
*these authors contributed equally