There is no abstract for this article.
(September 1997)
Health Economics
1997
http://onlinelibrary.wiley.com/doi/10.1002/(SICI)1099-1050(199709)6:5%3C505::AID-HEC294%3E3.0.CO;2-I/abstract;jsessionid=FC31721F0C665A2EAB98F29479F89561.d03t01?systemMessage=Wiley%20Online%20Library%20will%20be%20disrupted%20on%2011%20May%20from%2010%3A00-12%3A00%20BST%20%2805%3A00-07%3A00%20EDT%29%20for%20essential%20maintenance