Laboratory theory; Preanalytic phase of laboratotry procedures; Plasmatic proteins; Glucose and glycated proteins; Lipids and lipoproteins; Enzymology; Laboratory diagnosis of thyroid disorders; Laboratory diagnosis of pituitar gland-adrenal gland axis disorders; Reproduction hormones; Acid-base and electrolytes; Parameters of oxygen metabolism; Cardiomarkers; Methods of renal functions and nitrogen metabolism investigation; Methods of liver functions and disorders investigation; Calcium, magnesium, phosphorus; Trace elements and vitamins; Toxicological analyses in clinical biochemistry; Drugs monitoring; Inborn errors of metabolism; Methods of urine, pleural and abdominal exudate/transudate investigation; Tumormarkers; Methods of cerebrospinal fluid investigation; Bonemarkers; Good laboratory praxis and basics of management quality; Internal and external Quality assurance; Postanalytical phase, results transfer and date storage; Laboratory informations systems; Clinical theory; Cardiac disease; Diabetes mellitus; Lipids disorders; Bone metabolism; Disorders of iron metabolism; Disorders of intrinsic milieu; Kidney and urinary tract diseases; Urolithiasis; Gastrointestinal tract diseases; Neoplastic diseases; Endocrinological disorders; Neurological diseases; Reference ranges and cut-off values of laboratory methods; Indication and interpretation of laboratory results;