two-number coding for tissues, [a + b], the first was the
number of days since implantation (0,1,3,7,14 or 28) and
the second the number of days following explant (either 0
or 5) when the muscle was harvested. For example [3 + 0]
is the designation for samples explanted after three days
of implantation, where muscles were harvested immediately
Schematic of cross-section at electrode implant site with ‘separation
zone’ at explant.