Depression patients in developing countries most prominently show which of the following feature?

Multiple physical symptoms (such as heaviness of head, vague body aches) are paicularly common in the elderly depressives and depressed patients from the developing countries (such as India) * MC psychiatric disorder in India: Depression * Neurotransmitter involved: Serotonin and nor-epinephrine * MC cause of suicide: DepressionRisk features of suicide in depression: * Endogenous type of depression * Psychotic depression * MC type of post-puerperal psychosis: Depression * Nihilistic ideas: Seen in depression