13630
In a single practice during the 21 years 1971 - 1991 , the incidence of gestational diabetes in pregnancies in which norethisterone was prescribed was 32.4 % ( 22 of 69 ) in comparison with 7.1 % in pregnancies in which the women did not take norethisterone ( 137 of 1,684 ) ( p < 0.001 ) .
 adverse effect: gestational diabetes, norethisterone
Given options, please tell me the relationships of all the listed entity pairs.Output format is "relation1: word1, word2; relation2: word3, word4". 
Option: adverse effect 
Text: {0} 
 Entity Pairs:  gestational diabetes, norethisterone 
Answer:
 adverse effect: gestational diabetes, norethisterone