1. From the University of TorontoToronto, and London Regional Cancer Centre, London, Ontario, Canada; Regional Hospital of Lung Disease and Tuberculosis, Poznan, Poland; Helsinki University, Helsinki, Finland; Alton Ochsner Medical Foundation, New Orleans, LA; Greenville Memorial Medical Center, Greenville, SC; University Hospitals of Cleveland, Cleveland, OH; Veterans Affairs Medical Center, Houston, TX; and Rhône-Poulenc Rorer, Collegeville, PA, and Paris, France.