Form with character separators

Form with character separators

[DesdeChaves]

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I would like to produce a form with a character separators. However, my
code presents two problems:
first, the character box has no fixed dimensions and,
two,  I can't indent the text when it occupies multiple lines (ex, address
field).
I tried to use the starttabulate environment, but without sucess.
My questions are: Can I fix the size of the boxes? and Can I apply the
starttabulate environment to indent the field description and align all
descriptors and fields names (name, age, sex, race, address, ...)?

Thanks in advance

Jorge

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