This case involves two appeals arising out of an antitrust action brought by two nurse midwives, the obstetrician with whom they had affiliated, and three of their clients, against three Nashville hospitals, certain members of the medical staffs from two of the hospitals, another practicing obstetrician in Nashville, and a physician-controlled insurance company. Plaintiffs alleged that these defendants had engaged in several conspiracies to restrain trade, in violation of section 1 of the Sherman Antitrust Act, 15 U.S.C. § 1. Plaintiffs now appeal the district court's decision awarding summary judgment to defendants with respect to all but one of the alleged conspiracies. 689 F. Supp. 799. Two of the hospitals also bring an interlocutory appeal, contending that the district court erred in denying summary judgment with respect to the alleged conspiracy between the two hospitals. For the reasons stated, we affirm in part and reverse in part.