Effects Combination of Purple Sweet Potato Tub Ethanol Extract (Ipomoea batatas L.) And Atorvastatin on Levels Low-Density Lipoprotein and Intima-Media Thickness of The Aorta in Male Wistar Rats (Rattus norvegicus) Exposed to A High Fat Diet Putu Dian Pratita Lestari*, Anak Agung Ayu Dwi Adelia Yasmin, and I Nyoman Wiryawan