From the Department of Cardiology, Marshfield Clinic, Marshfield, Wis (S.H.R.), and The Heart Institute, Good Samaritan Hospital, Los Angeles, Calif (R.A.K.).
Correspondence to Shereif Rezkalla, MD, Director of Cardiovascular Research, Department of Cardiology, Marshfield Clinic, 1000 N Oak Ave, Marshfield, WI 54449. E-mail [email protected]
