My grandfathers cousin was a Sister Adorer of the Precious Blood. The PB devotion dates back to medieval times (I think). A religious order of men was founded in Europe in the 1830's (Missionaries of the Most Precious Blood) and an order of nuns in Quebec in the 1800s too (Sister Adorers). The sisters are still kind of traditional from what I here. But be weary of the men's order, they are Novus ordoized out of sight!