||Koivuniemi A. The biophysical properties of plasmalogens originating from their unique molecular architecture. FEBS Lett. 2017 Sep591(18):2700-2713. doi: 10.1002/1873-3468.12754 p.2701 right column 2nd paragraphPubMed ID28710769
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||Primary source  abstract: "To explore the hypothesis that alterations in ethanolamine plasmalogen may be directly related to the severity of dementia in Alzheimer's disease (AD), [investigators] performed a systematic examination of plasmalogen content in cellular membranes of gray and white matter from different regions of human subjects with a spectrum of AD clinical dementia ratings (CDR) using electrospray ionization mass spectrometry (ESI/MS)."
||P.2701 right column 2nd paragraph: "Plasmalogens are present almost in all mammalian tissues and their average percentage is approximately 15–20% of total phospholipids [primary sources]. Consequently, plasmalogens can be treated as a major phospholipid component of cell membranes. They are mostly enriched in the brain, heart, skeletal muscle and kidney, the most abundant plasmalogens being ethanolamine plasmalogens (PlsPEs) and choline plasmalogens (PlsPCs) [refs 12, 15]."