aDepartment of Pediatrics, University of Tennessee Health Science Center, Memphis, Tennessee

bMarshfield Clinic Research Institute, Marshfield Clinic Health Systems, Marshfield, Wisconsin

cSunTech Medical, Inc., Morrisville, North Carolina, USA

*Bruce S. Alpert retired.

Received 12 October 2021 Accepted 10 November 2021

Correspondence to Bruce Alpert, MD, 1350 Poplar Ridge Dr., Memphis, TN 38120, USA, Tel: +1 901 229 3719; e-mail: [email protected]