function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Argent, Graham Charles George', 4],
    ['Cheesman, L. Evelyn', 1],
    ['Chen, Wenna & Häkkinen, Markku & Ge, Xue-Jun', 2],
    ['Christenhusz, Maarten J. M.', 1],
    ['Häkkinen, Markku', 2],
    ['Häkkinen, Markku & Väre, Henry', 263],
    ['Jarvis, Charlie', 3],
    ['Joe, Alfred & Sreejith, E.', 1],
    ['Joe, Alfred & Sreejith, P. E. & Sabu, Mamiyil', 1],
    ['Joe, Alfred & Sreejith, Puravannoor Edakkatillum & Sabu, Mamiyil', 1],
    ['Lauterbach, Carl (Karl) Adolf Georg', 1],
    ['Mille, Christian & Henderson, Rosa C. & Cazères, Sylvie', 2],
    ['Simmonds, Joseph Henry', 2],
    ['Sreejith, Puravannoor E. & Joe, Alfred & Sabu, Mamiyil', 2],
    ['Väre, Henry & Häkkinen, Markku', 36],
    ['Other (3)', 3]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=325)',
    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);