correlation coefficients between handling time and plasma corticosteroid concentration of white leghorn hens were minimal when times varied from 43 to 161 sec ( r = .17 ; p less than .05 , df = 244 ) , and no association was found when blood collection times exceeding 90 sec were omitted ( r = -.02 , df = 219 ) .
C0040223
time
C0552379
collection times