US-educated siblings are selling their overseas assets and expanding their healthcare empire in India. Their listed hospital chain Fortis Healthcare, which has 65 hospitals, sold its Singapore diagnostics arm RadLink-Asia to IHH Healthcare for $107 million. Together with last year's sales of hospitals in Hong Kong, Vietnam and Australia, the company's total debt has fallen to $175 million from $1.1 billion two years ago. Fortis is mulling listing its diagnostics arm SRL Diagnostics.