Search for: [Title = Psychosocial working conditions and active leisure\-time physical activity in middle\-aged us workers] OR [Creator = Choi, Bangkyoo] OR [Creator = Schnall, Peter L.] OR [Creator = Yang, Haiou] OR [Creator = Dobson, Marnie] OR [Creator = Landsbergis, Paul] OR [Creator = Israel, Leslie] OR [Creator = Karasek, Robert] OR [Creator = Baker, Dean]