Validating the diagnostic code for acne in a tertiary care dermatology centre.

Background: Administrative databases provide valuable patient data and are used to conduct population-based studies. However, no studies have been conducted to validate the codes for dermatological conditions.

Objective: To evaluate the validity of ICD 9 code 706 for acne.

Peptidergic control of the heart of the stick insect, Baculum extradentatum.

The dorsal vessel of the Vietnamese stick insect, Baculum extradentatum, consists of a tubular heart and an aorta that extends anteriorly into the head. Alary muscles, associated with the heart, are anchored to the body wall with attachments to the dorsal diaphragm. Alary muscle contraction draws haemolymph into the heart through incurrent ostia.