Funding for this research was provided by:
Asia Pacific Observatory on Health Systems and Policies, the World Health Organization (Purchase Order 201710952)
Text and Data Mining valid from 2018-06-06
Received: 2 April 2018
Accepted: 4 May 2018
First Online: 6 June 2018
: As this was a review study no ethics committee approval was required.
: All authors provided consent for this publication.
: The authors declare that they have no competing interests.