These previous studies [12,13,14,15,16,17] had several limitations such as the inclusion of relatively small number of cases, especially for rare type of congenital anomalies (i.e., being underpowered to detect small or moderate risk effect), the use of case-control design (i.e., being more prone to selection bias), or insufficient adjustment for potential confounders (i.e., being more prone to confounding bias)
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Some fans may discount the fight due to its shorter length and relative lack of action
It was not immediately clear how the ruling would affect Altria Groups plans to divest its controlling stake in Kraft Foods Inc
Alternative nicotine delivery products such as e-cigarettes and HTPs produce fewer harmful chemicals compared with traditional cigarettes, and so could be expected to have fewer negative effects on oral health
