Julvez J, Ribas-Fito N, Torrent M, Forns M, Garcia-Esteban R, Sunyer J. Maternal smoking habits and cognitive development of children at age 4 years in a population-based birth cohort. Int J Epidemiol. 2007 Aug;36(4):825-32. doi: 10.1093/ije/dym107
Keenan A-M, McKenna SP, Doward LC, Conaghan PC, Emery P, Tennant A. OAQol: development and preliminary validation of a needs-based quality of life measure for osteoarthritis. Ann Rheum Dis. 2007;66:640.