Ariyaratna SR , Kulatunga R.D.H, A review of Aetiopathogenisis on Kaphaja Unmada ( Major Depressive  Disorder) 1st International Conference on Unani ,Ayurveda, Sidda and Traditional  Medicine 19th-21st  December, Institute of Indigenous Medicine, University of Colombo, Rajagiriya,Sri Lanka, 2013