S9 File -

A. The breakup of the set of 1265 trials for which the number of sites equaled the number of ECs into those with (i) single sites, (ii) more than one site (simple cases) and (iii) more than one site (complicated cases). B. For each subset, a listing of the details of the site name and ECs, and for one subset, statistics of sites without an EC partner. (XLSX)