Funding for this research was provided by:
Received: 15 January 2019
Accepted: 30 July 2019
First Online: 9 August 2019
Ethics approval and consent to participate
: Participant consent not required for literature review. Consent obtained for phenotypic and molecular analysis of Chilean participants and approved by Comite de Etica para la Investigación, Facultad de Medicina, Clínica Alemana Universidad del Desarrollo, Santiago, Chile.
: Not applicable.
: The authors declare that they have no competing interests.