Held Leonhard, Riebler Andrea
Institute of Social and Preventative Medicine, Division of Biostatistics, University of Zurich, Hirschengraben 84, 8001, Zurich, Switzerland,
Demography. 2013 Dec;50(6):1977-9; discussion 1985-8. doi: 10.1007/s13524-013-0255-8.