Duplicate matching enhancement

[blackjack26]

To better match duplicates when entering forms, possibly have a secondary line of defense that just matches the participant's last name with existing entries (if the first name was typed wrong). Also maybe even a third line of defense to match just the first name of the participant (if the last name was typed wrong). This would prevent duplicates that occur from name typos.

Also if someones name is "Jeffery" but some one only types in "Jeff" it could match that with LIKE queries. This might be more complex but would better cover all possibilities.

See Master Patient Index for better algorithms.