By definition, the etiology of primary osteoarthritis is unknown, but the pathology and pathogenesis of osteoarthritis have been extensively studied. [5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15] Historically, osteoarthritis has been divided into primary and secondary forms, although this division is somewhat artificial.
What's your relationship to the couple? - While the average gift ranges from $50 to $100 for those under 30, expect to spend $100 or more if you're close friends with the couple and are more established financially. For your nearest and dearest friends and relatives, gift costs can range from over a $100 to $200 or more.
What's your budget like? - The general consensus is that you should expect to spend at least $50 on a wedding gift. If you're a student or working with a tight budget, $50 is a perfectly acceptable amount to spend, regardless of how well you know the couple.What's your relationship to the couple? If you're flying across the country or halfway across the world to attend your friends' wedding, they'll understand if you spend a bit less on the gift. If you're willing to travel that far for this wedding, chances are they're pretty important to you, and you should still spend at least $50 to $100 on a gift.