Thank you, Linn. I'm following along. I hope these are all of the links:

http://en.wikipedia.org/wiki/Steven_M_Zeitels

http://www2.massgeneral.org/voicecenter/staff/zeitels.htm

http://web.mit.edu/shbt/research/citations/zeitels_s.html

http://web.mit.edu/shbt/research/citations/zeitels_s_1.html

http://www.vitals.com/doctors/Dr_Steven_Zeitels.html