Mathematical Equations to Predict Positive Airway Pressures for Obstructive Sleep Apnea: A Systematic Review.

Objective. To systematically review the international literature for mathematical equations used to predict effective pressures for positive airway pressure (PAP) devices. Methods.

Prevalence and outcome of focal segmental glomerulosclerosis in Iranian children with nephrotic syndrome.

Introduction: Some evidence suggest an increase in the prevalence of focal segmental glomerular sclerosis (FSGS) in children. To date, there has been no study of the outcome in children with FSGS and its frequency over several decades in Iran. We aimed to report the changing trend of FSGS incidence and its outcome in a sample of Iranian children.

A comparative study of characteristics and risky behaviors among the Iranian opium and opium dross addicts.

Background: Iran ranks first per capita in the use of opiates, but we have little information about possible differences regarding the 2 most commonly used illicit drugs, namely opium and its dross (residue).

Design: This is a cross-sectional study.

Setting: A cross-sectional study about drug abuse and drug dependence in Iran was conducted from April 2006 to August 2008 in the prisons of 28 Iranian provinces, in the treatment centers, and in the streets.