Table 3. First version of the algorithm and algorithm modifications.

First version of the algorithm

Morfo_1 AND Topog_1

First modification

(Morfo_1 AND NOT Morfo_K_neuroend) AND ((Topog_1 AND NOT (Topog_Upper_airways OR Topog_Resp_Not_specified))

Second modification *

(Morfo_1 AND NOT Morfo_K_neuroend) AND (Topog_1 AND NOT Topog_Upper_airways)

*Chosen as final version of the algorithm