function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Banks, Nathan', 1],
    ['Botero-Trujillo, Ricardo & Iuri, Hernán A.', 4],
    ['Botero-Trujillo, Ricardo & Martinez, Leonel', 7],
    ['Chamberlin, Ralph V.', 4],
    ['Harms, Danilo & Dupérré, Nadine', 3],
    ['Iuri, Hernán A. & Iglesias, Mónica S.', 9],
    ['Kraepelin, Karl', 3],
    ['Maury, E. A.', 4],
    ['Muma, Martin H.', 1],
    ['Pocock, Reginald Innes', 2],
    ['Poinar, George & Santiago-Blay, Jorge A.', 1],
    ['Werner, F.', 1],
    ['de Mello-Leitão, Cândido Firmino', 13]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=53)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 13, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);