We owe a great deal of gratitude to the team with which we worked who made the writing of this fourth edition a truly gratifying and enjoyable experience.

It began with Kristina Oberle and Rebecca Gaertner who had the foresight and determination to take on the project, followed by Kel McGowan who took over as acquisition editor and carried it over the finish line.

Other key players include:

• Senior Production Project Manager: Alicia Jackson

• Marketing Manager: Stephanie Kindlick

• Design Coordinators: Steven Druding and Doug Smock

• Senior Manufacturing Coordinator: Beth Welsh

• Prepress Vendor: Aptara, Inc.

• Project Manager: Harish Kumar

We are especially indebted to Kristina Oberle, our developmental editor, who kept track of a stream of disconnected material and buttoned up so many loose ends. Kristina's attention to detail and her availability to answer a multitude of questions has brought this complicated project to completion.

Thanks again to Peter Burk, Mary Ruth Buchness, and Ken Howe who were contributors to the first three editions.

This project never would have been realized without the initial foresight of Sonya Seigafuse who contributed to the second and third editions and was the catalyst for this fourth edition of our book.

Our art director, Larry Pezzato who focused on the illustrations and the processing of digital images, has been an essential contributor to this book, a book that depends on images.

Muchas gracias to Marcos and Rosa Sastre, who supplied the Spanish translations on some of the new handouts.

For this fourth edition, my appreciation also goes to Ashit Mahar and Ben Barankin for their excellent clinical photographs and to Ross Levy, whose advice about wound healing has been a great addition; his hands and surgical skills are featured more than once in this book.

Thanks go to the “brain trust” of many colleagues at Derm-Chat/Derm-Rx, who kept us up-to-date on the latest diagnostic and therapeutic issues in dermatology. Art Huntley who founded and Haines Ely carried on with this valuable online resource. Also thanks to Pam Basuk who has taken on the mantle. To the heavy posters—Joe Eastern, Jerry Bock, Diane Thaler, Pat Condry, Kevin Smith, Linda Spencer, Steve Stone, Gail Drayton, Steve Emmet, Ashit Mahwar, Otto Bastos, Bob Rudolph, Sahar Ghannam, Larry Finkel, Bill Danby, Lynn Margesson, Sate Hamza, Noah Scheinfeld, Steve Feldman, Bernie Recht, Barry Ginsberg, Bill Smith, Pierre Jaffe, Omid Zargari, Becky Bushong, Thomas Vaughn, Ed Zabawski, Jerry Litt, JoBohanon-Grant, Ben Treen, Rhett Drugge, Catelin Popescu, Lennie Rosmarin, Jo Herzog, Peter Panagotacos, Nejib Doss Koushik Lahiri, Emily Altman, Chuck Fishman, Susan Bushelman, Orin Goldblum, Robin Berger, Maida Burrow, Stu Kittay, Diane Davidson, Chuck Miller, Norm Guzick, Walter Wood, Sandeep Gupta, Alice Do, and many, many others who are too numerous to mention. You have been our “online classmates and teachers.” We thank you all.

Dr. Gonzalez would like to acknowledge her mentors in pediatric dermatology whose tutelage, guidance, and pearls of wisdom aided in the writing of the pediatric section. Specifically, Julie V. Schaffer, Seth J. Orlow, Harper Price, Helen T. Shin, Lawrence Schachner, Maria C. Garzon, and Miguel R. Sanchez have been important mentors.

We are immensely pleased with the superb job our publisher Wolters Kluwer Health has done in producing this edition.