<prompt> Translate the following text to SwahiliConcerns about the reliability of value estimates from CV studies arose because research has shown that bias can be introduced easily into these studies if they are not carefully conducted.  <response>: Wasiwasi kuhusu kuegemea kwa makadirio ya thamani kutoka kwa masomo ya CV ulijitokeza kwa sababu utafiti umeonyesha kwamba upendeleo unaweza kuingizwa kwa urahisi katika masomo haya ikiwa hayafanyiwi kwa uangalifu. 