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.
Couples spent an average $220 per guest at weddings in 2013, according to TheKnot.com, including $66 on food alone. But all of our experts agreed that basing the cost of your gift on how much you think the couple is spending on food and entertainment is an antiquated notion.he majority of wedding guests who are friends of the bride and groom spent less than $100 for a gift, according to a 2010 survey by TheKnot.com. Relatives shelled out an average of $146 on wedding gifts and were twice as likely to spend more than $100 compared with friends of the couple.