Establishment and evaluation of method to collect rat gingival 
crevicular fluid by using absorbent paper points
ZUO Zhi-gang,HU Min,LIU Shan, LI Zhi-min,JIANG Huan,LI Hong-fa
Journal of Jilin University(Medicine Edition) . 2014, (05): 1028 -1032 .  DOI: 10.13481/j.1671-587x.20140524