10.1371/journal.pone.0164620.g001 Virginia Lope Virginia Lope Nerea Fernández de Larrea Nerea Fernández de Larrea Beatriz Pérez-Gómez Beatriz Pérez-Gómez Vicente Martín Vicente Martín Victor Moreno Victor Moreno Laura Costas Laura Costas Federico Longo Federico Longo José Juan Jiménez-Moleón José Juan Jiménez-Moleón Javier Llorca Javier Llorca Nieves Ascunce Nieves Ascunce Rosana Peiró-Pérez Rosana Peiró-Pérez Jone M. Altzibar Jone M. Altzibar Adonina Tardón Adonina Tardón Juan Alguacil Juan Alguacil Carmen Navarro Carmen Navarro Ángeles Sierra Ángeles Sierra Ana Belén Vega Ana Belén Vega Amaya Villafañe Amaya Villafañe Gemma Castaño-Vinyals Gemma Castaño-Vinyals Manolis Kogevinas Manolis Kogevinas Marina Pollán Marina Pollán Nuria Aragonés Nuria Aragonés Flow chart displaying the selection process of colorectal cancer cases and controls. Public Library of Science 2016 colorectal cancer etiology rectal cancer colorectal cancer risk case-control study 128 women CI Spain Background Sex hormones hormone replacement therapy colorectal cancer cases role 2016-10-24 17:37:51 Figure https://plos.figshare.com/articles/figure/Flow_chart_displaying_the_selection_process_of_colorectal_cancer_cases_and_controls_/4058757 <p>MCC-Spain study 2008–2013.</p>