Table 2. Quality control strategy for future works.

Sigma metrics	Parameters	Levels of control	Measurements	Westgard rules
> 6	AMY, AST, ALP, ALT, CRE, HDL-C, TBIL, Triglyceride, Uric acid	2	1	13S
4 - 6	CK, Cholesterol total, GLU, LD, Total protein	2	1	12.5S
3 - 4	ALB	2	2	13S/22S/R4S/41S
< 3	Blood urea, Chlorine, Sodium, Potassium	3	2	13S/22S/R4S/41S
ALB – albumin. AMY – amylase. AST - aspartate aminotransferase. ALT - alanine aminotransferase. ALP - alkaline phosphatase . HDL-C - high density lipoprotein-cholesterol. CRE – creatinine. CK - creatine kinase. GLU – glucose. LD - lactate dehydrogenase. TBIL - total bilirubin.