Abstract

Get full access to this article
View all access options for this article.
References
1.
Dannenberg E. M.
: RCT 59 (1986 ), 512 .
2.
Wolff S.
: RCT 66 (1993 ), 163 .
3.
Cotton G. R.
: RCT 58 (1985 ), 774 .
4.
Wang M.-J.
: RCT 71 (1998 ), 520 .
