Robin Williams - who would have turned 70 today - was 'frustrated' with his health struggles before he ultimately took his life in 2014, his son has revealed.The legendary comedian had unknowingly been misdiagnosed with Parkinson's disease and was actually suffering from Lewy body dementia - the second most common type of progressive dementia after Alzheimer's - his family found out after his death.'What I saw was frustration,' Zak, 38, told host Max Lugavere on his podcast The Genius Life. 'What he was going through didn't match one to one [with what] many Parkinson's patients experience.
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