The UnitedHealth deal may face a regulatory challenge because of Brazilian restrictions on foreign ownership of hospitals.

WSJ: UnitedHealth to Buy 90% of Brazil's Amil for $4.3 Billion

The UK Foreign Office said it was sending representatives to hospitals in the area to establish whether any Britons were among the victims.

BBC: Glasgow & West Scotland

Parkway Health, a Singaporean hospital chain, says the city of Singapore attracted approximately 450, 000 international patients last year, and in India, the Apollo Hospitals Group says it has treated more than 60, 000 foreign patients in the last five years.

CNN: The story

Cuban field hospitals in Port-au-Prince were already treating hundreds of injured, according to Cuban Foreign Minister Bruno Rodriguez.

BBC: International aid efforts for Haiti gather pace