function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Pinto-Da-Rocha, Ricardo', 1],
    ['Polydoro, Nathalia Sena & Pinto-Da-Rocha, Ricardo', 1],
    ['Pérez-González, Abel', 1],
    ['Pérez-González, Abel & Ayala-Apaza, Arli G.', 1],
    ['Pérez-González, Abel & Sharma, Prashant P. & Proud, Daniel N.', 2],
    ['Roewer, Carl Friedrich', 1],
    ['Sharma, Prashant P.', 7],
    ['Sharma, Prashant P. & Buenavente, Perry A. C.', 7],
    ['Sharma, Prashant P. & Kury, Adriano B. & Giribet, Gonzalo', 55],
    ['Tourinho, Ana Lúcia & González, Abel Pérez', 4]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=80)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 10, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);