Int. J. Environ. Res. Public Health 2011, 8 433 28. Shopland, D.R.; Anderson, C.M.; Burns, D.M. Association between home smoking restrictions and changes in smoking behaviour among employed women. J. Epidemiol. Community Health 2006, 60, 44-50. 29. Osypuk, T.L.; Acevedo-Garcia, D. Support for smoke-free policies: A nationwide analysis of immigrants, US-born, and other demographic groups, 1995–2002. Amer. J. Public Health 2010, 100, 171-181. 30. Dinno, A.; Glantz, S. Tobacco control policies are egalitarian: A vulnerabilities perspective on clean indoor air laws, cigarettes prices, and tobacco use disparities. Soc. Sci. Med. 2009, 68, 1439-1447. 31. Ogilvie, D.; Petticrew, M. Reducing social inequalities in smoking: Can evidence inform policy? A pilot study. Tob. Control 2004, 13, 129-131. 32. Thompson, M.E.; Fong, G.T.; Hammond, D.; Boudreau, C.; Driezen, P.; Hyland, A.; Borland, R.; Cummings, K.M.; Hastings, G.B.; Siahpush, M.; Mackintosh, A.M.; Laux, F.L. Methods of the International Tobacco Control (ITC) Four Country Survey. Tob. Control 2006, 15, iii12-iii18. 33. Hyland, A.; Hassan, L.M.; Higbee, C.; Boudreau, C.; Fong, G.T.; Borland, R.; Cummings, K.M.; Yan, M.; Thompson, M.E.; Hastings, G. The impact of smoke-free legislation in Scotland: results from the Scottish ITC: Scotland/UK longitudinal surveys. Eur. J. Public Health 2009, 19, 198-205. 34. Borland, R.; Yong, H.H.; Siahpush, M.; Hyland, A.; Campbell, S.; Hastings, G.; Cummings, K.M.; Fong, G.T. Support for and reported compliance with smoke-free restaurants and bars by smokers in four countries: Findings from the International Tobacco Control (ITC) Four Country Survey. Tob. Control 2006, 15, iii34-iii41. 35. Heatherton, T.F.; Kozlowski, L.T.; Frecker, R.C.; Rickert, W.; Robinson, J. Measuring the heaviness of smoking: Using self-reported time to the first cigarette of the day and number of cigarettes smoked per day. Brit. J. Addict. 1989, 84, 791-799. 36. Hyland, A.; Higbee, C.; Borland, R.; Travers, M.; Hastings, G.; Fong, G.T.; Cummings, K.M. Attitudes and beliefs about secondhand smoke and smoke-free policies in four countries: Findings from the International Tobacco Control Four Country Survey. Nicotine Tob. Res. 2009, 11, 642-649. 37. Shopland, D.R.; Anderson, C.M.; Burns, D.M.; Gerlach, K.K. Disparities in smoke-free workplace policies among food service workers. J. Occup. Environ. Med. 2004, 46, 347-356. 38. HM Government. A Smoke-Free Future: A Comprehensive Tobacco Control Strategy for England; Department of Health: London, UK, 1 February 2010. Available online: http://www.dh.gov.uk/en/ Publicationsandstatistics/Publications/PublicationsPolicyAndGuidance/DH_111749 (accessed on 5 May 2010).