!

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Note added at 7 mins (2010-03-17 15:30:59 GMT)
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Я думаю, что G1 не имеет какой-либо связи именно с гепатитом. G (group) - группа.
Вот тоже самое в контексте гепатита:
Patients who underwent RT between 1985 and 2001 were excluded if they showed DM prior to RT, graft survival of less than 90 days, and unknown anti-HCV status (n = 15). Two groups (G1 and G2) were distinguished according to the immunosuppressive regimen: G1 (transplanted 1985–1996) received steroids, azathioprine, and cyclosporine (n = 330), whereas G2 (1997–2000) received new drugs in several combinations (MMF in 87% and/or tacrolimus in 35% [n = 240]). Patients with HCV antibodies pre- and/or post-RT were considered HCV-positive. Post-RT DM requiring prolonged treatment with oral antidiabetics or insulin (>1 month) was assessed using Kaplan-Meier curves and Cox analysis.
http://linkinghub.elsevier.com/retrieve/pii/S004113450300611...


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Note added at 11 mins (2010-03-17 15:35:05 GMT)
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Вот, появилась еще одна версия:
G1 - Genotype 1вируса гепатита. Может, эта версия будет вернее.
Тогда: пациенты с генотипом 1/пациенты с другим генотипом (не с генотипом1)
Those with chronic Hepatitis C infected with Hepatitis C Virus Genotype 1 Low Viral Load (HCV LVL G1) and treated withPeg-Intron 1.5 μg/kg/week plus Rebetol (ribavirin) 800-1200 mg/day who achieved a negative Hepatitis C Virus-Ribonucleic Acid (HCV-RNA) at Week 4 and at Week 24
http://clinicaltrials.gov/ct2/show/results/NCT00709228

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Note added at 12 mins (2010-03-17 15:36:00 GMT)
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Точно, это будет ГЕНОТИП.
http://www.google.com/search?q=гепатит С генотип 1&hl=en&sou...