Table 2.
Strategy description
| Strategy | Example |
| FirstLet: FL for all letters in SF |
Alpha Beta (AB) Fail: Alpha-Beta (AB) |
| FirstLetOneChSF: Applied for 1-letter SF. FL with restrictionsa. |
Dopamine (D) |
| FirstLetGen: FC or FCG, at least one FCG | 1-Alpha-Beta (AB), Alpha-Beta (AB) Fail: Alpha Beta (AB) |
| FirstLetGen2: FC or FCG | Alpha Beta (AB), Alpha-Beta (AB) |
| FirstLetGenS: SF consists of upper-case letters and lower-case letter 's' at the end. LS for final 's' in SF and FC for the rest |
Alpha Betas (ABs) Fail: Alpha Beta Gammas (ABs) |
| FirstLetGenStp: FC or FCG or ST, at least one ST (at most one ST between matched words or at end) |
Alpha and Beta (AB) Fail: Alpha Beta (AB), Alpha word Beta (AB) |
| FirstLetGenStp2: FC or FCG or ST, at least one pair of adjacent ST (at most two ST between matched words or at end) |
Alpha of the Beta (AB) Fail: Alpha Beta (AB), Alpha and Beta (AB) |
| FirstLetGenSkp: FC or FCG or SK, at least one SK (at most one SK between matched words or at end) |
Alpha and Beta (AB), Alpha word Beta (AB) Fail: Alpha Beta (AB) |
| WithinWrdFWrd: FC or FCG or SBW, at least one SBW, all SBW in a FC or FCG matched word in LF |
AlphaBeta (AB) Alpha BetaGamma (ABG) Fail: AlphaBeta inGamma (ABG) (SBW but no FC in inGamma) |
| WithinWrdWrd: FC or FCG or SBW, at least one SBW |
AlphaBeta (AB), AlphaBeta inGamma (ABG) Fail: AlphaBxx (AB) (Bxx is not defined-word) Alpha Beta (AB) (no SBW) |
| WithinWrdFWrdSkp: WithinWrdFWrd or SK, at least one SK (at most one SK between matched words or at end) |
AlphaBeta word Gamma (ABG) Fail: AlphaBeta Gamma (ABG) |
| WithinWrdFLet: FC or FCG or NF, at least one NF, all NF in a FC or FCG matched word in LF |
AlphaBxx (AB) Fail: AlphaBxx inCxx (ABC), Alpha Bxx (AB) |
| WithinWrdLet: FC or FCG or NF, at least one NF |
AlphaBxx (AB), AlphaBxx inCxx (ABC) Fail: Alpha Bxx(AB) (no NF) |
| WithinWrdFLetSkp: WithinWrdFLet or SK, at least one SK (at most one SK between matched words or at end) |
AlphaBxx word Gamma (ABG) Fail: AlphaBxx Gamma (ABG) |
| ContLet: FC or FCG or CL, at least one CL, all CL in a FC or FCG matched word in LF |
ABxx (AB), ABxx Cxx (ABC), AxxBCxx (ABC) Fail: ABxx xCxx (ABC), xABxx (AB) |
| ContLetSkp: ContLet or SK, at least one SK (at most one SK between matched words or at end) |
ABxx and Cxx (ABC), ABxx word Cxx (ABC) Fail: ABxx Cxx (ABC) |
| AnyLet: The 1st character of SF: FC or FCG. The others: AC or SK (at most one SK between matched words or at end) | Alpha xBeta (AB), Alpha word xBeta (AB) |
a The SF and LF pair must appear in MEDLINE at least twice and LF must not be a stopword.