function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Arabyat, Sahar & Katbeh-Bader, Ahmad & Greathead, David', 1],
    ['Dils, J. & Özbek, H.', 1],
    ['Evenhuis, Neal L.', 4],
    ['Evenhuis, Neal L. & Greathead, David J.', 1],
    ['Ghahari, H. & Havaskary, M. & Tabari, M. & Ostovan, H.', 3],
    ['Gharali, Babak & Kamali, Karim & Evenhuis, Neal', 3],
    ['Gibbs, David', 13],
    ['Greathead, D. J. & Evenhuis, N. L.', 1],
    ['Greathead, David J.', 18],
    ['Hall, Jack C.', 2],
    ['Tabet, Ali B.', 1],
    ['Yao, Gang & Yang, Ding & Evenhuis, Neal L. & Gharali, Babak', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=50)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 12, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);