1
Published 2014
Canadian Agency for Drugs and Technologies in Health

2
Published 2008
Royal College of Physicians

3
by Patlak, Margie
Published 2010
National Academies Press

4
by McCrory, Douglas C.
Published 2001
U.S. Dept. of Health and Human Services, Public Health Service, Agency for Healthcare Research and Quality

5
by McCrory, Douglas C.
Published 2001
U.S. Dept. of Health and Human Services, Public Health Service, Agency for Healthcare Research and Quality