Ayuda Buscar en la ayuda Buscar en la ayuda Bespoke instrumental variables with nonideal reference populations Sjölander, Arvid [1] ; Gabriel, Erin E [2] [1] Department of Medical Epidemiology and Biostatistics, Karolinska Institute , Nobels väg 12A, 17177 Stockholm , [2] Department of Public Health, University of Copenhagen , Øster Farimagsgade 51353 København K, Copenhagen , Localización: American journal of epidemiology, ISSN-e 1476-6256, ISSN 0002-9262, Vol. 194, Nº. 4, 2025, págs.