Quantifying a rare disease in administrative data: the example of calciphylaxis.
Nigwekar SU, Solid CA, Ankers E, Malhotra R, Eggert W, Turchin A, Thadhani RI, Herzog CA. Quantifying a rare disease in administrative data: the example of calciphylaxis. J Gen Intern Med. 2014 Aug; 29 Suppl 3:S724-31.