My usual doctor was not in and I was very concerned about a mole on my back that looked unusual, so I saw Dr Ehlert. The mole turned out to be benign. Dr. Ehlert supposedly used liquid nitrogen to remove the mole, but nothing happened. It looks exactly the same as before. I have catastrophic insurance, so must pay for this myself and am unhappy to pay for something that didn't work. Now she tells me that it sometimes takes several treatments, which she did NOT tell me originally. I would n...