A double-blind placebo-controlled trial of theophylline in general practice (Q39251592)
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(P31) (Q13442814)
(P304) 14-17
(P433) 1
(P478) 45
(P577) Tuesday, January 1, 1991
(P921) (Q269829)
(Q108853737)
(P1433) (Q27709728)
(P1476) "A double-blind placebo-controlled trial of theophylline in general practice" (language: en)
(P2093) Neville RG
Crombie IK
McDevitt DG
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