function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['B & Rowson & C & N & Lange', 2],
    ['Bursey, M. L. & Herbert, D. G.', 4],
    ['Cole, Mary L. & Herbert, David G.', 16],
    ['Emberton, Kenneth C.', 8],
    ['Emberton, Kenneth C. & Griffiths, Owen L.', 2],
    ['Emberton, Kenneth C. & Slapcinsky, John & Campbell, Chelsey A.', 2],
    ['Foon, Junn Kitt & Clements, Gopalasamy Reuben & Liew, Thor-Seng', 1],
    ['Herbert, D. G.', 1],
    ['Herbert, D. G. & Rowson, B.', 3],
    ['Herbert, David G.', 4],
    ['McGhie, Henry', 2],
    ['Muratov, Igor V.', 8],
    ['Neubert, Eike', 6],
    ['Rowson, B & Warren, B. H. & Ngereza, C. F.', 2],
    ['Résumé, Jacques Daget', 6],
    ['Other (3)', 3]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=70)',
    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);