Haptoglobin beta chain isoforms in the plasma and peritoneal fluid of women with endometriosis. Posted on 1 May 200517 February 2020 by admin Ferrero S, Gillott DJ, Remorgida V, Anserini P, Price K, Ragni N, Grudzinskas JG. Haptoglobin beta chain isoforms in the plasma and peritoneal fluid of women with endometriosis. Fertil Steril 2005;83:1536-1543.https://www.fertstert.org/article/S0015-0282(05)00360-2/fulltext