Table 1. Characteristics of the 143 participating GPs compared to all GPs in each regions.

	Northern region, n (%)	Southern region, n (%)	Central region, n (%)
	All GPs^a	Participants	All GPs^a	Participants	All GPs^a	Participants
Total	303	59 (20)	785	46 (5.9)	811	38 (4.7)
Mean age, years	54	49	59	49	52	51
Female GPs	134 (44)	35 (59)	385 (49)	30 (65)	427 (53)	24 (63)

^aNumbers from the Organisation of General Practitioners³²