PT  - JOURNAL ARTICLE
AU  - D. O'Brien
TI  - Serum theophylline concentration in general practice patients
DP  - 1987 Sep 01
TA  - The Journal of the Royal College of General Practitioners
PG  - 419--419
VI  - 37
IP  - 302
4099  - http://bjgp.org/content/37/302/419.2.short
4100  - http://bjgp.org/content/37/302/419.2.full
SO  - J R Coll Gen Pract1987 Sep 01; 37