Kawabata S, Tate K, Sasaki Y, Suzuki T.
Kango Tenbo. 1988 Jun;13(7):806-10.
PMID: 3419229

Symanski ME.
Nurse Educ. 1991 May-Jun;16(3):18-22. doi: 10.1097/00006223-199105000-00009.
PMID: 2041627

Naito S, Kimura C, Kawabata K.
Kango Tenbo. 1986 May;11(6):583-8.
PMID: 3637502

Rispail D.
Soins. 2004 Jan-Feb;(682):24-6.
PMID: 15027364

Bithell J.
Pract Midwife. 2012 Jul-Aug;15(7):46.
PMID: 22908505

Francis MB, Brinkworth JM.
Nurse Educ. 1988 May-Jun;13(3):3-4.
PMID: 3386897

Branch M, Anderson M.
ABNF J. 1999 Nov-Dec;10(6):131-5.
PMID: 10855085

Guan H, Zhao Z, Zhou Q, He F, Yu M, Cai W, Yang X, Xu Z, Hou H, Hu D.
Int J Clin Exp Med. 2014 Sep 15;7(9):3013-20. eCollection 2014.
PMID: 25356176