function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Ahl, E.', 5],
    ['Andréfouët, Serge & Chen, Wei-Jen & Kinch, Jeff & Mana, Ralph', 17],
    ['Du, Jianguo & Loh, Kar-Hoe & Hu, Wenjia & Zheng, Xinqing', 5],
    ['Greenwood, P. H.', 28],
    ['Greenwood, P. H. & Barel, C. D. N.', 5],
    ['Greenwood, P. H. & Gee, J. M.', 9],
    ['Günther, Albert Charles Lewis Gotthilf', 11],
    ['Lortet, L.', 5],
    ['Poll, M.', 6],
    ['Pyle, R. L. & Earle, J. L. & Greene, B. D.', 5],
    ['Randall, John Ernest Dr.', 5],
    ['Regan, C. T.', 12],
    ['Richard L. Pyle & John L. Earle & Brian D. Greene', 5],
    ['de Zeeuw, Marnix P. & Mietes, M. & Niemantsverdriet, P.', 7],
    ['van Oijen, Martien J. P.', 7],
    ['Other (74)', 117]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=249)',
    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);