- Author: Johan P. Olsen Peter Maassen (auth.) Peter Maassen Johan P. Olsen (eds.)
- Language: English
- Year: 2007
- Author: Ruben Olsen
- Language: English
- Year: 2010
- Author: Stein Haugom Olsen Anders Petterson
- Language: English
- Year: 2005
- Author: Julian Templeman Andy Olsen Michael Hudson Tyrone Howe
- Language: English
- Year: 2002
- Author: Robert F. Garnett Jr Eric Olsen Martha Starr
- Language: English
- Year: 2009
- Author: Trygve Helgaker Poul Jorgensen Jeppe Olsen
- Language: English
- Year: 2000
- Author: Pierre L. Young LeighAnne Olsen Roundtable on Evidence-Based Medicine Institute of Medicine
- Language: English
- Year: 2010
- Author: Stein Haugom Olsen Anders Petterson
- Language: English
- Year: 2005