Drs. Calbert, Powell, Post or Chernoff?

[Anonymous]

Does anyone have experience with any of the doctors below? I'm looking for a developmental pediatrician for my 3 y.o. son with autism.

(1) Dr. Jacqueline Calbert - Children's Outpatient Center, Fairfax, VA
(2) Dr. Beverly Powell - Springfield, VA
(3) Dr. Alexander Post - Falls Church, VA
(4) Dr. Robin Chernoff - Silver Spring/Rockville, MD

Any kind of info (good or bad) that you can provide about these docs would be greatly appreciated.