McFarlane's law, critical mass, and clinical research.
Boyd
Robert
R
D035843:Biomedical Research / Q000191:economics*; D004526:Efficiency; D005380:Financing, Government / Q000458:organization & administration; D011640:Public Policy; D011643:Publishing; D012109:Research Support as Topic / Q000458:organization & administration*; D012577:Schools, Medical / Q000191:economics*; D013222:State Medicine; D006113:United Kingdom