function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Andréfouët, Serge & Chen, Wei-Jen & Kinch, Jeff & Mana, Ralph', 1],
    ['Angulo, Arturo', 1],
    ['Angulo, Arturo & Betts, Joel T. & González-Alemán, Néstor J.', 1],
    ['Bariche, Michel & Fricke, Ronald', 1],
    ['Carneiro, Miguel & Martins, Rogélia & Landi, Monica', 2],
    ['Chu, Y. - T.', 2],
    ['Esmaeili, Hamid Reza & Hamidan, Neshat', 2],
    ['Gray, John Edward', 2],
    ['Ho, Hsuan-Ching & Shao, Kwang-Tsao', 2],
    ['Ho, Hsuan-Ching & Smith, David G. & Mccosker, John E.', 5],
    ['Kaup, Johann Jakob', 4],
    ['Kita, Tomohiro & Matsushige, Kazuki & Endo, Shunsuke', 2],
    ['McClelland, J.', 4],
    ['Peters, Wilhelm Carl Hartwig', 5],
    ['Wilkinson, Clare L. & Hui, Tan Heok', 2],
    ['Other (24)', 24]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=60)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 16, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);