BMJ : British medical journal
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Effects of prematurity and intrauterine growth on respiratory health and lung function in childhood.
To determine whether birth weight and gestational age are associated with respiratory illness and lung function in children aged 5-11 years. ⋯ Lung function is affected mainly by intrauterine environment while respiratory illness, especially wheezing, in childhood is related to prematurity.
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To analyse trends in the number of authors per article over the past 10 years. ⋯ The phenomenon of expanding authorship in biomedical journal articles is not explained by the hypothesis that newer research technologies have necessitated more extensive collaboration. Rather, the data suggest that conferral of authorship may sometimes have a volitional component which contributes to rising author numbers. It is proposed that replacement of the Vancouver convention with a "first author, last author" citation system may help stem this rise in author numbers.