The blocking method was used for randomization. For random allocation, the participants were divided into three groups, with a sample number of 30 in each group, randomization method was used. For this purpose, 15 blocks of 6 were used. In this method, the intervention and control groups are divided into three groups, A, B, C. Possible blocks were AABBCC, ABCABC, BACABC, CCBBAA, ABCCBA, CBACBA, numbers 1 to 6 were assigned to each of these blocks, respectively. Then the numbers from 1 to 6 were extracted from the random numbers table. (Obviously, in the case of extraction of the zero number, the number from 7 to 9 was again retrieved from the random number extraction), and it is selected in accordance with the extracted number of a block to identify 15 blocks. In the same way as the blocks are obtained, a list of 90 will be provided and the participants will be assigned respectively two groups A, B, and C respectively.