Selection of genetic instruments in Mendelian randomisation studies of sleep traits.

"Conflict of interest: No authors have any conflict of interest to declare."

"Valentina Paz was supported by Programa de Desarrollo de las Ciencias Básicas (PEDECIBA, MEC-UdelaR, Uruguay), Agencia Nacional de Investigación e Innovación (ANII, Uruguay) [grant number MOV_CA_2020_1_163153], Comisión Sectorial de Investigación Científica (CSIC, UdelaR, Uruguay), Comisión Académica de Posgrados (CAP, UdelaR, Uruguay). Hassan S. Dashti was supported by the National Heart, Lung, and Blood Institute (NHLBI) [grant number K99HL153795]. Stephen Burgess was supported by the United Kingdom Research and Innovation Medical Research Council [grant number MC_UU_00002/7] and the National Institute for Health Research Cambridge Biomedical Research Centre [grant number BRC-1215-20014]. Victoria Garfield was supported by the Professor David Matthews Non-Clinical Fellowship from the Diabetes Research and Wellness Foundation [grant number SCA/01/NCF/22], and a grant from Diabetes UK [grant number 15/0005250] and the British Heart Foundation [grant number SP/16/6/32726]. The views expressed are those of the authors and not necessarily those of the National Institute for Health Research or the Department of Health and Social Care."