Misc: A "emerald" wedding anniversary is celebrated after how many years?

Questions

Chewing gum was patented by who?

Chromosomal disorder occurring in about 1 out of every 800 births?

Chronic condition in which the skin of the scalp flakes off in excessive amounts?

Chronic disease marked by overgrowth of hands, feet, & lower part of the face, resulting from excessive production of somatotropin, the growth-stimulating hormone hormone?

Cigarette brand, or first name of Forrest Gump author.?