A UK dad who was told his shakes as a teenager were due to “drinking too much tea” was diagnosed with Parkinson’s aged 20 — and is still without a wheelchair 40 years on from his initial symptoms. John Granahan, 54, knew something was wrong from age 13, after he began shaking uncontrollably in his English class. He drank up to 10 cups of tea a day so doctors initially dismissed his symptoms as being due to his caffeine intake. The IT technician, from Leeds, was finally diagnosed with Parkinson’