The TrialNet Natural History Study of the Development of Type 1 Diabetes: objectives, design, and initial results - Mahon, J L; Sosenko, J M; Rafkin-Mervis, L; Krause-Steinrauf, H; Lachin, J M; Thompson, C; Bingley, P J; Bonifacio, E; Palmer, J P; Eisenbarth, G S; Wolfsdorf, J; Skyler, J STrialNet Natural History Committee; Type 1 Diabetes TrialNet Study Group (Pediatr Diabetes, 2009)