Running for cover

Investors on Friday initially drove up shares of Advanced Tissue Sciences (ATIS) and Organogenesis (ORG) after Thursday's General and Plastic Surgery Devices Panel recommended approval of both companies' skin products (see BioCentury Extra, Jan. 30).

Both stocks were halted during Thursday's panel meeting. When trading reopened on Friday, ORG jumped more than $7, reaching $26.50 before closing up $2.625 at $22.062. ATIS topped out at a more modest $15.625 before closing up $0.438 at $13.75...