function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bilton, David T. & Bird, Matthew S.', 1],
    ['Fikáček, Martin & Barclay, Maxwell V. L. & Perkins, Philip D.', 6],
    ['Fikáček, Martin & Matsumoto, Keita & Perkins, Philip', 9],
    ['Luna-Luna, Alba Magali & Martins, Caleb Califre', 2],
    ['Perkins, Philip D.', 56],
    ['Pérez-Hernández, Cisteil Xinum', 1],
    ['Takiya, Daniela Maeda & Santos, Allan Paulo Moreira', 12],
    ['Zaragoza-Caballero, Santiago & Rodríguez-Mirón, Geovanni M.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=88)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 8, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);