Hu, Cheng ; Eriksson, Joel 
; Haring, Robin ; Grarup, Niels ; Vandenput, Liesbeth ; Wallaschofski, Henri ; Lorentzen, Erik ; Hansen, Torben ; Mellström, Dan ; Pedersen, Oluf ; Nauck, Matthias ; Lorentzon, Mattias ; Nystrup Husemoen, Lise Lotte ; Völzke, Henry ; Karlsson, Magnus ; Baumeister, Sebastian E. ; Linneberg, Allan ; Ohlsson, Claes
; Haring, Robin ; Grarup, Niels ; Vandenput, Liesbeth ; Wallaschofski, Henri ; Lorentzen, Erik ; Hansen, Torben ; Mellström, Dan ; Pedersen, Oluf ; Nauck, Matthias ; Lorentzon, Mattias ; Nystrup Husemoen, Lise Lotte ; Völzke, Henry ; Karlsson, Magnus ; Baumeister, Sebastian E. ; Linneberg, Allan ; Ohlsson, Claes 
Abstract
Context Obesity in men is associated with low serum testosterone and both are associated with several diseases and increased mortality. Objectives Examine the direction and causality of the relationship between body mass index (BMI) and serum testosterone. Design Bi-directional Mendelian randomization (MR) analysis on prospective cohorts. Setting Five cohorts from Denmark, Germany and Sweden ...
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