Helen Campbell
发表
Jeannie Callum,
Paul C Hébert,
Gilles Capellier,
2015,
The New England journal of medicine.
Jeremy Fairbank,
Oliver Rivero-Arias,
Alastair Gray,
2005,
BMJ : British Medical Journal.
Andrew Briggs,
Simon Thompson,
Martin Buxton,
2007,
Journal of health services research & policy.