function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Jiang, Wei & Wang, Guoquan & Liu, Xingyue', 4],
    ['Liu, Xingyue & Dvorak, Libor', 2],
    ['Liu, Xingyue & Dvořák, Libor & Constant, Jérôme', 2],
    ['Liu, Xingyue & Hayashi, Fumio', 3],
    ['Liu, Xingyue & Hayashi, Fumio & Yang, Ding', 32],
    ['Liu, Xingyue & Yang, Ding', 11],
    ['Martins, Caleb C. & Ardila-Camacho, Adrian', 1],
    ['Tu, Yuezheng & Liu, Xingyue', 3]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=58)',
    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);