Owens, R E Time-dependent loss of radioimmunoassayable levels of progesterone following ambient temperature incubation of heparinized bovine blood. [electronic resource] - Theriogenology Apr 1980 - 305-9 p. digital Publication Type: Journal Article ISSN: 0093-691X Standard No.: 10.1016/0093-691x(80)90094-1 doi