Preface of the special issue in memoriam and celebration of Donald S. Coffey from special issue senior guest editor

This special issue of the American Journal of Clinical and Experimental Urology is in memoriam and celebration of Donald S. Coffey, Ph.D.. Enclosed you will find a series of articles, in Editorial and Mini-review format, that reflect upon Don’s scientific contributions and their current and future impact in biology and medicine. Moreover, these articles recall Don’s enormous heart, his willingness to put everyone before himself, to encourage, inspire, and celebrate his students and fellows, and finally, to make science fun and always interesting. We asked several scientists and clinicians who have trained with Don, or worked closely with him, to write a manuscript in a unique style to not only provide scientific review, but to also memorialize Don’s remarkable charisma, mentorship style, creativity, charity, and compassion. I sincerely hope that you enjoy these articles, and that they will help to carry on Don’s spirit and wisdom in your own research, in your labs, and in your lives