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Kehe, C., Wick, K., McCarville, S. et al. Absorption of theophylline from a new theophylline controlled-release capsule. Eur J Clin Pharmacol 40, 319–320 (1991). https://doi.org/10.1007/BF00315219
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DOI: https://doi.org/10.1007/BF00315219