Retraction of

• Gestational changes in pulmonary converting enzyme activity in the fetal rabbit.

  Stalcup SA, Pang LM, Lipset JS, Odya CE, Goodfriend TL, Mellins RB. Stalcup SA, et al. Circ Res. 1978 Nov;43(5):705-11. doi: 10.1161/01.res.43.5.705. Circ Res. 1978. Retraction in: Circ Res. 1985 Oct;57(4):646. doi: 10.1161/01.res.57.4.646. PMID: 213200 Retracted.
• Angiotensin-converting enzyme activity and its modulation by oxygen tension in the guinea pig fetal-placental unit.

  Davidson D, Stalcup SA, Mellins RB. Davidson D, et al. Circ Res. 1981 Feb;48(2):286-91. doi: 10.1161/01.res.48.2.286. Circ Res. 1981. Retraction in: Circ Res. 1985 Oct;57(4):646. doi: 10.1161/01.res.57.4.646. PMID: 6257420 Retracted.