Table 3. Stratified responses of medical biochemistry laboratory in national questionnaire.

MBL	Q1	Q2	Q3	Q4	Q5	Q6	Q7	Q8	Q9	Q10	Q11	Q12	Q13	Q14	Q14a		Q15	Q16	Q17	Q18
1	d	a	a	c	c	b	b	b	c	b	c	a	b	a	A		c	b	a	a
2	c	b	a	a	b	a	a	NR	c	b	b	a	b	a		B	c	b	b	a
3	c	b	a	a	c	b	b	b	b	b	b	b	b	a	B		b	a	a	b
4	b	a	a	c	e	b	b	b	c	a	a	a	b	b	-		b	NR	c	b
5	b	b	a	a	b	b	b	a	c	b	b	a	b	a	B		b	a	a	b
6	a	b	a	b	b	b	b	a	c	b	d	a	NR	b	-		d	c	c	b
7	a	a	a	c	e	b	b	b	c	b	b	a	a	b	-		b	b	a	a
8	d	b	a	a	b	a	b	b	b	b	b	b	b	a	A		c	c	c	b
9	b	a	a	c	d	b	b	a	b	b	c	a	c	b	C		c	a	a	b
10*	c	b	a	a	b	b	b	a	NA	NA	NA	NA	b	NA	NA		c	NA	NA	NA
MBL- medical biochemistry laboratory. Q1 - Q18 – questions defined in Table 2. NR - no response. NA - not applicable. A - urine commercial control. B – “in-house” control. C - external quality control. *MBL performed sweat conductometry;