John A. Sobrato and the Art of Making a Difference   A recent sampling: The Sobratos Donate $20 Million To The New Packard Children’s Hospital Addition To Be Called The Sobrato Pavillion … The Sobratos Donate $5 Million To Build The Sobrato Pavillion at the Valley Medical Center (which is the largest donation ever to a general hospital west of the Mississippi) … The Sobrato Cancer Center at VMC (a most important addition, opened 2009, on a floor in the new Specialty Center Building) ..