N. Hawkins, R. Sanson-Fisher, A. Shakeshaft, C. D'Este, and L. Green. American journal of preventive medicine, 33 (2):
162-8(August 2007)4640<m:linebreak></m:linebreak>LR: 20071115; JID: 8704773; RF: 73; 2006/05/16 received; 2007/02/23 revised; 2007/03/31 accepted; ppublish;<m:linebreak></m:linebreak>Tipus d'estudis.
R. Sanson-Fisher, B. Bonevski, L. Green, and C. D'Este. American journal of preventive medicine, 33 (2):
155-61(August 2007)6271<m:linebreak></m:linebreak>LR: 20071115; JID: 8704773; RF: 61; 2006/05/18 received; 2007/02/20 revised; 2007/04/03 accepted; ppublish;.
T. Stukel, E. Fisher, D. Wennberg, D. Alter, D. Gottlieb, and M. Vermeulen. JAMA : the journal of the American Medical Association, 297 (3):
278-85(January 2007)4085<m:linebreak></m:linebreak>LR: 20070518; PUBM: Print; GR: 1P01-AG19783-01/AG/NIA; JID: 7501160; CIN: JAMA. 2007 Jan 17;297(3):314-6. PMID: 17227985; CIN: JAMA. 2007 May 16;297(19):2077-8; auhor reply 2078. PMID: 17507341; CIN: JAMA. 2007 May 16;297(19):2077; auhor reply 2078. PMID: 17507342; ppublish;<m:linebreak></m:linebreak>Variables instrumentals.