Vitamin D, obesity and leptin in relation to bladder cancer incidence and survival: prospective protocol study
Randi Elin Gislefoss, Jo Steinson Stenehjem, Helga Helseth Hektoen, Bettina Kulle Andreassen, Hilde Langseth, Karol Axcrona, Elisabete Weiderpass, Alison Mondul, Trude Eid Robsahm
BMJ Open Mar 2018, 8 (3) e019309; DOI: 10.1136/bmjopen-2017-019309