The hypodermis is the innermost and thickest layer of the skin. It invaginates into the dermis and is attached to the latter, immediately above it, by collagen and elastin fibres. It is essentially composed of a type of cells specialised in accumulating and storing fats, known as adipocytes.
Fatal familial insomnia Fatal familial insomnia (FFI) is a very rare, autosomal dominant inherited, disease of the brain. It is caused by a mutation in a protein called prion protein (PrP): asparagine-178 is replaced by aspartic acid.
* Confirmed fatal cases of 2009 pandemic influenza A (H1N1) were defined as influenza-like illness or postmortem findings suggestive of viral pneumonia and laboratory-confirmed 2009 pandemic influenza A (H1N1) virus infection by real time reverse transcriptase-- polymerase chain reaction (rRT-PCR).