The Parsi of Mumbai are, as a group, the exception in India in exhibiting pd. They are thought to be prone to it because they ritually burn Aspand seed, thus inhaling fumes whose composition is similar to an MAOB.

I recently visited Pakistan for a family wedding where I was in many family homes. Everyone was shocked that someone as young as myself should have pd. I spoke with a senior doctor there who told me that pd is "rare in this part of the world" and yopd practically unheard of. I was high in the mountains of Azad Kashmir too where I saw many very elderly people, very fit and traversing the mountains on foot. The diet I experienced included a lot of chicken and white rice, heavily spiced.

Looking forward to hearing from you lindy.