This issue of Peritoneal Dialysis International (PDI) tackles an issue that is controversial in many areas of medicine: the question of how large an effect caregiver experience has on outcome. It is intuitively sensible to presume that people get better at doing things when they do them more often and to believe that this would apply in medicine as much as in other areas of human activity. However, scientific methodology requires that we prove such assertions and many studies have addressed this in the medical literature over the past two decades.
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