1 Stowers Institute for Medical Research, Kansas City, MO 64111, USA.
2 Stowers Institute for Medical Research, Kansas City, MO 64111, USA; Department of Anatomy and Cell Biology, University of Kansas Medical Center, Kansas City, KS 66160, USA.
3 Stowers Institute for Medical Research, Kansas City, MO 64111, USA. Electronic address: JLW@stowers.org.