function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Costa, Leidiane O. & Duarte, Paulo R. M. & Iannuzzi, Luciana', 1],
    ['Gasca-Álvarez, Héctor & Amat-García, Germán', 1],
    ['Gasca-Álvarez, Héctor Jaime & Deloya, Cuauhtémoc', 2],
    ['Gillett, Conrad P. D. T.', 1],
    ['Hielkema, Auke J. & Hielkema, Meindert A.', 4],
    ['Kirby, William', 1],
    ['Krajcik, Milan', 1],
    ['Milani, Leonello', 1],
    ['Morón, Miguel-Angel', 1],
    ['Prandi, Massimo & Grossi, Paschoal C.', 8],
    ['Ratcliffe, Brett C. & Morón, Miguel-Angel', 10],
    ['Taboada-Verona, Carlos & Sermeño-Correa, Carlos', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=32)',
    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);