HDL/LDL: this ratio compares the level of HDL cholesterol (good) to LDL cholesterol (bad). In this case, it is recommended to have a ratio of 0.4:1, but if you do not have this, it is recommended that you should maintain a ratio above 0.3:1.
In July 1519, Cortes and his men took over Veracruz and in mid-August continued on towards Tenochtitlan. They made alliances along the way with various native tribes who would help the Spaniards take over Cholula, the second largest city in Mexico.
Disease played a huge part in the fall of the Aztec empire. This is what happened. After Cortes landed in Mexico, another Spanish army came from Cuba to make sure he followed orders. Cortes would have none of that, and went to fight them.