Tabular data from the Morningstar article:
US Patients per Physician for Selected Diseases Prevalence Physician Number Patients per
(million) Group Active Physician
Psoriasis 5.8 Dermatology 10,957 533
CHF 4.8 Cardiology 21,875 219
IBD 1.4 GI 12,089 116
AMD 1.8 Ophthalmology 18,054 97
Diaper Rash 1.0 Pediatrics 56,519 18
Salesforce Efficiency Ratio (SER) 2006 Economic
Sales #Reps SER Moat
ENDP 910 480 1.9 Narrow
KG 1,989 1,050 1.9 Narrow
ELN 560 319 1.8 None
AGN 3,063 1,750 1.8 Wide
Shire 1,797 1,158 1.6 Narrow
AXCA 292 194 1.5 Narrow
FRX 3,442 2,839 1.1 Narrow
SEPR 1,197 1,675 0.7 None
VRX 907 1,531 0.6 None