Article History
Received: 17 May 2019
Accepted: 16 August 2019
First Online: 18 September 2019
Ethics approval
: This is not applicable for this review.
: This is not applicable for this review.
: CL has served on an advisory board for Agios, Daiichi-Sankyo, and Jazz Pharmaceuticals and as a speaker for Astellas and Jazz Pharmaceuticals. KD and KN declare that they have no competing interests.