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| TEST | SAMPLE TYPE | REPORT TIME |
| LDH | SERUM | FROM 2 TO 24 HOURS |
| LDH (CSF) | CSF | FROM 2 TO 24 HOURS |
| LEAD | EDTA WHOLE BLOOD | FROM 2 TO 10 DAYS |
| LEGIONELLA PNEUMOPHILIA ANTIBODY | SERUM | FROM 2 TO 20 DAYS |
| LEISHMANIA DONOVANI ANTIBODY | SERUM | FROM 2 TO 20 DAYS |
| LH | SERUM | FROM 2 TO 24 HOURS |
| LIPASE | SERUM | FROM 2 TO 5 DAYS |
| LIPIDS | SERUM | FROM 2 TO 24 HOURS |
| LIPOPROTEIN A Lp(a) | SERUM | FROM 2 TO 24 HOURS |
| LISTERIA ANTIBODY | SERUM | FROM 2 TO 24 HOURS |
| LITHIUM | SERUM | FROM 2 TO 24 HOURS |
| LIVER FUNCTION TEST | SERUM | FROM 2 TO 24 HOURS |
| LKM ANTIBODY | SERUM | FROM 2 TO 24 HOURS |
| LUPUS ANTICOAGULANT | CITRATED PLASMA | FROM 2 TO 24 HOURS |
| LYME ANTIBODY (BORRELIA) | SERUM | FROM 2 TO 24 HOURS |