screening number prefix should depend on location and control/patient status
PRC => P
LIH => L
FT and Control => L
FT and Patient => P
it should not depend on the worker anymore
PRC => P
LIH => L
FT and Control => L
FT and Patient => P
it should not depend on the worker anymore
mentioned in commit 1e61664d
closed via commit 1e61664d
mentioned in commit 4b3709d8