Which patient has a normal proteinuria level and is diagnosed with SLE? Please give his or her patient ID.
normal proteinuria level refers to 0 < `U-PRO` < 30; diagnosed with SLE refers to Diagnosis = 'SLE';
SELECT DISTINCT T1.ID FROM Patient AS T1 INNER JOIN Laboratory AS T2 ON T1.ID = T2.ID WHERE T2.`U-PRO` > 0 AND T2.`U-PRO` < 30 AND T1.Diagnosis = 'SLE'