Dr. Marquard and Dr Calkins are excellent and both very competent! I met Dr Calkins when she was in Residency and liked her so much I followed her and Dr Marquard when they finished Residency! I drive out to Glendale from Central Phoenix just to see Dr Calkins. I have had some serious medical issues arise in the last few years and they both have walked me through them and gotten me back on the road to good health!!