Just bought a copy of the Sunday Times, there's a more in depth article inside which I'm not sure is available on the website.
Some more interesting information in there:
"In Dec 2011 and Jan 2012 a steady stream of NOP athletes had been given infusions, according to the report. Salazar wrote to the athletes instructing them to 'say no' if anti-doping officials inquired about whether they had received an infusion..."
"The USADA report cites evidence that led its investigators to conclude the infusions were 'almost certainly' more than 50ml and therefore doping violations"