function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Cunha, Carlo M.', 1],
    ['Dall, William Healey', 1],
    ['Darragh, Thomas A.', 2],
    ['Gofas, Serge & Rolán, Emilio', 4],
    ['Gray, John Edward', 1],
    ['Kantor, Yuri & Lozouet, Pierre & Puillandre, Nicolas', 1],
    ['Kantor, Yuri I. & Fedosov, Alexander & Puillandre, Nicolas', 1],
    ['Makiyama, Jirô', 1],
    ['Morassi, Mauro & Bonfitto, Antonio', 3],
    ['Negri, Mauro Pietro & Corselli, Cesare', 2],
    ['Pease, W. H.', 4],
    ['Stahlschmidt, Peter & Poppe, Guido & Tagaro, Sheila', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=22)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 12, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);