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	1.	Is calculating pack-years retrospectively a valid method to estimate life-time tobacco smoking? A comparison between prospectively calculated pack-years and retrospectively calculated pack-years. [electronic resource] by Bernaards, C M Twisk, J W Snel, J Van Mechelen, W Kemper, H C Producer: 20020125 In: Addiction (Abingdon, England) vol. 96 Online resources: Available from publisher's website Availability: No items available. Save to lists Add to cart (remove)
	2.	Smoking behaviour and biological maturation in males and females: a 20-year longitudinal study. Analysis of data from the Amsterdam Growth and Health Longitudinal Study. [electronic resource] by Bernaards, C M Kemper, H C Twisk, J W van Mechelen, W Snel, J Producer: 20020402 In: Annals of human biology vol. 28 Online resources: Available from publisher's website Availability: No items available. Save to lists Add to cart (remove)
	3.	Can strenuous leisure time physical activity prevent psychological complaints in a working population? [electronic resource] by Bernaards, C M Jans, M P van den Heuvel, S G Hendriksen, I J Houtman, I L Bongers, P M Producer: 20060131 In: Occupational and environmental medicine vol. 63 Online resources: Available from publisher's website Availability: No items available. Save to lists Add to cart (remove)

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