NORTHBROOK EXCESS AND SURPLUS INSURANCE COMPANY, PLAINTIFF, APPELLANT, v. THE MEDICAL MALPRACTICE JOINT UNDERWRITING ASSOCIATION OF MASSACHUSETTS, DEFENDANT, APPELLEE. No. 89-1932.United States Court of Appeals, First Circuit.Heard February 7, 1990. Decided April 11, 1990. Richard J. Riley, with whom Murphy, Demarco and O’Neill, P.C., Boston, Mass., was on brief for appellant. Michael T. Gass, with […]