Thompson B.
Nurs Times. 2000 Dec 14-2001 Jan 3;96(50):20.
PMID: 11965794

Johnson BV.
Am J Nurs. 2005 Oct;105(10):15. doi: 10.1097/00000446-200510000-00006.
PMID: 16205381

Dörpinghaus S.
Pflege Aktuell. 2003 Jun;57(6):318-9.
PMID: 12838787

Cleland V.
NLN Publ. 1990 Jun;(20):165-70.
PMID: 2235374

Wootton R.
Nurs Stand. 2008 Jul 9-15;22(44):26-7.
PMID: 18686396

Ausfahl CB.
RN. 2004 Nov;67(11):14.
PMID: 15600017

Taylor A.
Nurs Times. 1995 Nov 1-7;91(44):38-40.
PMID: 7501522