<prompt> Translate the following text to EnglishUchunguzi huo una nguvu na udhaifu, ambayo inaonyesha kwamba kuunganisha makadirio ya athari kutoka kwa kila utafiti inaweza kutoa makadirio bora ya mabadiliko yanayotarajiwa katika matukio ya bronchitis ya muda mrefu kuliko kutumia utafiti mmoja tu.  <response>: Both studies have strengths and weaknesses, which suggest that pooling the effect estimates from each study, may provide a better estimate of the expected change in incidences of chronic bronchitis than using either study alone. 