What does C.S.F., C.J.O. stand for?

Context:
From the National Heart, Lung and Blood Institute’s Framingham Heart Study (C.S.F., C.J.O.), Framingham, Mass; Division of Endocrinology, Metabolism, and Diabetes, Department of Medicine (C.S.F., K.M.P.), Brigham and Women’s Hospital and Harvard Medical School, Boston, Mass; Boston University, Department of Mathematics (J.M.M.; R.B.D.) and School of Public Health, Division of Biostatistics (C.-Y.L., L.A.C.), Boston, Mass; Radiology Department (U.H.) and Department of Medicine (J.B.M., C.J.O.), Massachusetts General Hospital, Harvard Medical School, Boston; Semmelweis University (P.M.-H.), Budapest, Hungary; and Boston University School of Medicine (R.S.V.), Boston, Mass.

More:
http://circ.ahajournals.org/content/116/1/39.short