I have relied on "doctor Merck" for more than 40 years. When a corpsman in the navy, dr.Merck went with me on all ambulance calls. Your clear and concise explanations are invaluable. I am 74 now and mostly retired but get asked questions by family and friends about medical issues. I reply"let me consult with Dr.Merck" You have yet to steer me wrong. Thank you and keep up your life saving work.