This applies e.g. in Denmark, where the burden of HPV-linked cancer, in particular HPV 16 linked head and neck cancer, is higher in men than in women [ 25].
"Studies dating back to the 19th century linked head trauma to permanent brain damage, but Riddell failed to communicate the danger to Mr Hornung," the attorney, William Gibbs, said in a written statement.
The league has changed its rules to make the game safer and modified its medical protocols for concussions as mounting scientific evidence in recent years linked head trauma sustained on the field to long-term cognitive damage.
Many of the isoprenoids possess carbon skeletons that may be regarded as built up from isoprene units linked "head to tail"; that is, carbon atom 1 of one unit is bonded to carbon atom 4 of the next unit.
In contrast to all known lignins which are comprised of polyaromatic networks, the PCFA lignin is a linear polymer derived almost totally from caffeyl alcohol monomers linked head to tail into benzodioxane chains via the 'endwise' radical coupling reactions that typify lignification.
Moreover, injury and exposure data were collected as event-based counts, and therefore there is no way to link head injury data to individual characteristics (e.g., age, years of playing experience) or to environmental or policy changes, in order to directly test etiologic hypotheses.
Sometimes the Ub molecules are linked "head-to-tail" with the C-terminus of Ub conjugated via peptide bond to the α-amino group of the first methionine of the previous Ub, resulting in generation of linear chains.
According to this model, the mitogenome duplicates to form a dimer genome (two monomer-mitogenomes linked head-to-tail).
This is a possible process because there have been similar events in dimeric mitogenomes (two monomeric mitogenomes linked head-to-tail) [ 40].
The first step would have been a duplication of the entire mitogenome, resulting in a dimeric molecule with the two monomers linked head-to-tail.
