TY - GEN AU - Martinez de Haas,M G AU - Poels,P J AU - de Weert,C J AU - Thomas,C M AU - Rooyackers,J M AU - Hoefnagels,W H TI - [Subnormal vitamin B6 levels in theophylline users] SN - 0028-2162 PY - 1998///0625 KW - Aged KW - Aged, 80 and over KW - Drug Antagonism KW - Humans KW - Lung Diseases, Obstructive KW - drug therapy KW - Middle Aged KW - Pyridoxal Phosphate KW - blood KW - Retrospective Studies KW - Theophylline KW - adverse effects KW - Vitamin B 6 Deficiency N1 - Publication Type: English Abstract; Journal Article ER -