Two members of the research team checked and cleaned the data; some variables with many values, such as country of qualification, year of qualification, and self reported ethnicity, were simplified for analysis.
Explanatory variables included were sex, country of qualification (grouped as UK, rest of European Union and European Economic Area, and outside this area), years since qualification, doctor's specialty, inquiry type, inquiry source, and (in selected models) content of inquiry.
Mirroring the HSCIC statistics, India is the second most common country of qualification after Britain, according to the council, which says 25,122 doctors registered in the UK were trained in the world's second most populous nation.
Perisic had illuminated his country's qualification campaign with those now familiar surges down the left flank, scoring six in nine matches and convincing Internazionale to pluck him from Wolfsburg.
This much we know: Ireland's captain, then a 30-year-old volatile driving force who had almost single-handedly dragged his country through qualification for Japan and South Korea 2002 out of a group containing Portugal and Holland, decided to leave the camp out of frustration at poor preparation but then changed his mind.
Uganda goalkeeper Denis Onyango says it his time his country achieved qualification for the Africa Cup of Nations again - by beating Zambia this weekend.
They contain information on practice codes, Primary Care Trusts (PCTs) codes, GPs age, gender and country of qualification; GP type (i.e. salaried or partner), full-time equivalence (FTE) (including hours if available).
On Tuesday evening, while England fans celebrated their country's qualification for next year's Brazilian World Cup, the streets of Brazil were once again suffocated by clouds of tear gas and acrid smoke.
Survival analysis was used to examine variations in retention by country of qualification.
*Data for 10 inquiries with missing country of qualification are not shown.
