function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Annandale, N.', 9],
    ['Calman, William Thomas', 3],
    ['Darwin, Charles Robert', 7],
    ['Gruvel, A.', 5],
    ['Hiro, F.', 3],
    ['Hoek, Paulus Peronius Cato', 4],
    ['Lanchester, W. F.', 2],
    ['Li, Kaiqin & Liang, Zongli & Liang, Hongbin', 2],
    ['Newman, William A.', 3],
    ['Pilsbry, Henry A.', 13],
    ['Pitriana, Pipit & Jones, Diana S. & Corbari, Laure', 10],
    ['Shahdadi, Adnan & Sari, Alireza & Naderloo, Reza', 7],
    ['Withers, T. H.', 3],
    ['Young, Paulo S.', 6],
    ['Zhibin, Gan & Xinzheng, Li', 4],
    ['Other (17)', 18]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=99)',
    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);