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Meeting our ends by our means: protecting children from SHS in research
  1. Tonatiuh Barrientos-Gutierrez1,2,
  2. David Gimeno3,
  3. George L Delclos4,
  4. James Thrasher1,5,
  5. Paula Knudson4
  1. 1Tobacco Research Department, National Institute of Public Health, Mexico City, Mexico
  2. 2Center for Social Epidemiology and Population Health, University of Michigan, Ann Arbor, Michigan, USA
  3. 3The University of Texas - School of Public Health, San Antonio, Texas, USA
  4. 4The University of Texas - School of Public Health, Houston, Texas, USA
  5. 5Department of Health Promotion, Education, and Behavior, School of Public Health, University of South Carolina, Columbia, South Carolina, USA
  1. Correspondence to Dr Tonatiuh Barrientos-Gutierrez, Tobacco Research Department, National Institute of Public Health, 7a. Cerr. Fray Pedro de Gante #50, Col. Seccion XVI, Del. Tlalpan, Mexico City 14000, Mexico; tbarrientos{at}

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We are concerned by the recent publication of a randomised clinical trial in your journal, in which smoking parents were asked to continue smoking in the presence of their children for 6 months to evaluate if secondhand smoke (SHS) exposure increased the risk of bruxism.1 It is surprising that after acknowledging that SHS is “…a serious public health threat” with a large impact on children's health, ranging from respiratory affections to cardiovascular damage, authors conducted a study in which:“The smoking members of the families in group 1 were asked …

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