“…20 Other authors have applied this same principle of combining the general world view of 'complexity' with a more specific and detailed middle-range theory for undertaking (for example) organizational case studies, 21 designing information systems, 22;23 developing clinical microsystems 24 and preparing for bioterrorism. 25 Our original BMJ series on complexity in health care has been cited by some 900 publications. These include many scholarly papers which recognized the introductory focus of that series and offered nuanced corrections, extensions and adaptations.…”