heart - cardiology, liver - ?

HEPATOLOGY
List of words for the clue heart - cardiology, liver - ? from the crossword:
TEETH STOMATOLOGY NEUROLOGY BRAIN EKGS EKG ORGAN AORTA ECG AORTAS ORGANS VITALS SOUL VEIN DONOR VISCUS AGE PATE FOIE
WordClue
OILcod-liver or mineral
RATEof exchange or heart
BRAINcardiology - heart, neurology - ?
HEARThepatology - liver, cardiology - ?
LIVERcardiology - heart, hepatology - ?
MEDALPurple Heart
TEETHcardiology - heart, stomatology - ?
ATRIUMpart of heart
BOWELScore, heart
BRAVERYheart
DARKNESSHeart of ... (Conrad)
HEPATITISinflammation of the liver tissue
NEUROLOGYheart - cardiology, brain - ?
VENTRICLEpart of heart
CARDIOLOGYliver - hepatology, heart - ?
PERICARDIUMpart of heart
STOMATOLOGYheart - cardiology, teeth - ?
NEUROLOGYheart - cardiology, brain - ?
STOMATOLOGYheart - cardiology, teeth - ?