Volume 2; 2008 Editorials Research Osteopathic manipulative treatment and its relationship to autonomic nervous system activity as demonstrated by heart rate variability: a repeated measures study PMCID: PMC2442110 Impact of predisposing, enabling, and need factors in accessing preventive medical care among U.S. children: results of the national survey of children's health PMCID: PMC2615756 Reviews Study Protocol | ||