Incipient nephropathy in normotensive IDDM patients (study 306) EUCLID was a European multicentre randomised trial of lisinopril (n=265) and placebo (n=265) in IDDM patients with “ normotension”, defined as DBP 75-90 mmHg and SBP ≤ 155 mmHg, aged 20-59 years, with < 36 years of age at onset of IDDM and need for insulin therapy within 12 months of diagnosis.