Native English speakers, can you please help me with these issues?

Is this paragraph free of mistakes: "We once conducted an INQUIRY about stress. At the beginning, we obviously collected some personal data, such as name, age and profession, I no longer recall if if we asked anything else, but at least I'm sure we asked those three DATA. Aside from that, we asked if the... show more Is this paragraph free of mistakes:


"We once conducted an INQUIRY about stress.
At the beginning, we obviously collected some personal data, such as name, age and profession, I no longer recall if if we asked anything else, but at least I'm sure we asked those three DATA.
Aside from that, we asked if the respondents felt stress in their profession, how they managed it, and if this had ever had any effects on their health."
1 answer 1