The phrase "because of either of" is correct and usable in written English.
It is often used to imply a comparison between two or more different ideas, people, or things. For example: "I cannot choose between the two options because of either of their risks."
Krakow, Poland; Lviv, Ukraine; Stockholm, Sweden; and Oslo and Norway all submitted bids to the IOC but they were scrapped because of either a lack of public or political support in their own countries.
Many child soldiers face a more difficult reintegration into society, because of either a lack of education or traumatic psychological damage.
These detailed effects of nucleotide binding went undetected in the previous DXMS measurements because of either a lack of data points or intrinsic limitations of the technique.
With only a minority of patients expected to experience substantial benefit, most will discontinue therapy because of either a lack of efficacy or tolerability problems.
However, it remains quite unknown in wildlife mammals because of either a lack of interest or a relative inaccessibility to the gland.
This activity requires the network of chaperone proteins under control of the stress and cellular survival genes daf-16 and hsf-1 because deletion of either of these genes blocked glucose's neuroprotective effects.
Two of these helices, the alternate lower stem and the helix that sequesters the slippery sequence, appear to mutually stabilize each other because disruption of either of these helices by LNA binding destabilized or induced refolding of the other.
Oligomerization of SCR peptides was dependent on the presence of two leucine residues, because removal of either or both leucines of the heptad repeats reduced oligomerization.
Our analysis of the forelimb-regulatory element of Tbx5 suggests that inputs from RA, β-catenin signaling, and Hox4 and 5 paralogs are all required for normal expression of Tbx5, because mutations of either of these sites downregulate the activity of this fragment.
