ATLANTICARE MEDICAL CENTER; BETH ISRAEL HOSPITAL; BRIGHAM + WOMENS HOSPITAL; BROCKTON HOSPITAL; BURBANK HOSPITAL; CARDINAL CUSHING GENERAL HOSPITAL; CARNEY HOSPITAL; CHARLTON MEMORIAL HOSPITAL; EMERSON HOSPITAL; FAULKNER HOSPITAL; FRAMINGHAM UNION HOSPITAL; LEONARD MORSE HOSPITAL; LOWELL GENERAL HOSPITAL; MA GENERAL HOSPITAL; MALDEN HOSPITAL; MARLBOROUGH HOSPITAL; MELROSE WAKEFIELD HOSPITAL; MORTON HOSPITAL + MEDICAL CENTER; MT AUBURN HOSPITAL; NEW ENGLAND DEACONESS HOSPITAL; NEW ENGLAND MEMORIAL HOSPITAL; NORWOOD HOSPITAL; RI HOSPITAL; SALEM HOSPITAL; SOMERVILLE HOSPITAL; SOUTH SHORE HOSPITAL; ST ELIZABETHS HOSPITAL OF BOSTON; ST JOHNS HOSPITAL; ST JOSEPHS HOSPITAL FATIMA; ST JOSEPHS HOSPITAL LOWELL; ST JOSEPHS HOSPITAL PROVIDENCE; STURDY MEMORIAL HOSPITAL; UNIV OF MA MEDICAL CENTER; UPJOHN; WALTHAM WESTON HOSPITAL + MEDICAL CENTER; WINCHESTER HOSPITAL