| Hans-Günter Meyer-Thompson | International
USA. The End of the X-Waiver: Not a Moment Too Soon!
USA. The End of the X-Waiver: Not a Moment Too Soon!
Pergolizzi J, LeQuang JAK, Breve F.
Cureus. 2021 May 19;13(5):e15123. doi: 10.7759/cureus.15123. PMID: 34159025; PMCID: PMC8212919.