For many years that was the smart-aleck, in-a-nutshell version of my honorifics policy when it comes to Ph.D.s. In "Lapsing Into a Comma," I got more precise:
Doctors are doctors. People with doctorates are people with doctorates.
It's best to avoid the issue altogether, and unless your publication routinely uses courtesy titles (Mr. Clinton met with Mr. Kohl), it's a pretty easy issue to avoid. If Marcus Welby is a physician, say physician Marcus Welby. Otherwise you have to make tough decisions on where to draw the Dr. line. Dentists? Veterinarians? Chiropractors?
If you think I'm being a Nazi about this . . .
At least seven U.S. citizens working as researchers in Germany have faced criminal probes in recent months for using the title "Dr." on their business cards, Web sites and resumes. They all hold doctoral degrees from elite universities back home.