TY - JOUR T1 - Accounting for cross boundary flows. JO - Br Med J (Clin Res Ed) PY - 1987/10/10 AU - Brazier J ED - DO - DOI: 10.1136/bmj.295.6603.898 VL - 295 IS - 6603 SP - 898 EP - 900 Y2 - 2025/04/06 ER -