Special thanks to all of our families and friends: Caroline Campbell, Mike,
Scotti, and Brian Miller, Wayne and Ila Harris, Bob Gilliland, Ruben, Rafaela,
Linda, and especially Gabriel Serrato, Jose Represas-Perez and Ana Beatriz
Cardenas, Chuck Ballingall, Bill Southworth, Byron Arthur, Kim, Kate, and
Caroline Kundahl, and Cheryl and Joseph Graffagnini.
John also wishes to thank the Campbell family for providing hospitality in
Australia and Palo Alto during the writing of this book and Professor Hank
Greely for providing inspiration to see the book to completion....