= Halfdan Ihlen obituary in Tidsskrift for Den norske legeforening
{c}
{title2=2022}
{title2=10.4045/tidsskr.22.0182}
https://tidsskriftet.no/2022/04/minneord/halfdan-ihlen
Colleague-authored primary memorial, published 4 April 2022, volume 142, DOI 10.4045/tidsskr.22.0182. Opening biographical paragraphs state birth in Oslo in 1943, death on 11 February 2022, specialist qualification in internal medicine and cardiology in 1982, and development of the cardiac ultrasound laboratory at Rikshospitalet. The image immediately before the opening memorial paragraph is the identified portrait. Scientific measurement contributions are separately supported by Ihlen’s original paper.
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