We, too, sought another opinion because I felt Dr. Tan was "too" conservative...he certainly treated us and warned us it may kill my dad (and almost did twice in five weeks) but that is the job of an oncologist! We did ultimately switch to Dr. Andrea Wang-Gillam as primary oncologist for my dad from Dec 2010-March 2011. She was proactive in all treatment and we also sought a fourth opinion in Dr. Wells Messersmith (University of Colorado Hospital , Aurora) to ensure there was no other tx. It seems between Barnes and USC there is little on the i-70 corridor in between! He assured us he would have recommended the same course of action and treatment.My dad passed away shorthly after the Colorado consult, so we were never able to follow up. I loved Dr. Messersmith's bedside manner and thought into the consultation!!! If anyone ever wants further details on Barnes or University of Colorado, feel free to email me at firstname.lastname@example.org.