The extent of a focal tendon abnormality was intrasubstance in none (0%) of 16 patients with full-thickness tears, one (20%) of five patients with bursal surface partial-thickness tears, two (20%) of 10 patients with articular surface partial-thickness tears, and two (15%) of 13 patients with tendons without tear.
1 Adequate Intake (AI), where no RDA has been established, but the amount established is somewhat less firmly believed to be adequate for everyone in the demographic group.  Tolerable upper intake levels (UL), to caution against excessive intake of nutrients (like vitamin A) that can be harmful in large amounts.
Just to make the abbreviations more complicated, the EAR was calculated, which is the Estimated Average Requirement of a nutrient needed to meet the needs of 50 percent of the population. The RDA is generally 20 percent or so higher than that and was thought to meet the needs of 97 percent or more of our population.