| http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=11869668&dopt=Abstract |
| Cochrane Database Syst Rev. 2002;(1):CD003523. |
|
Hulme J, Robinson V, DeBie R, Wells G, Judd M, Tugwell P. Cochrane Collaborating Center, Center for Global Health, Institute of Population Health - University of Ottawa, 1 Stewart Street, Ottawa, Ontario, Canada, K1N 6N5. |