function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Atkins, H. J. & Kartonegoro, A.', 41],
    ['Christenhusz, Maarten J. M.', 22],
    ['Fischer, Eberhard & Darbyshire, Iain', 6],
    ['Greke, Kristine', 6],
    ['Hilliard, Olive Mary & Burtt, Bernard Dearman', 24],
    ['Jarvis, Charlie', 11],
    ['Li, Shu & Xin, Zi-Bing & Chou, Wei-Chuen & Huang, Yi & Pan, Bo', 5],
    ['Morel, Jérémie & Duminil, Jérôme & Munzinger, Jérôme', 5],
    ['Möller, Michael & Middleton, David & Nishii, Kanae', 25],
    ['Nguyen, Cuong Huu & Wen, Fang & Pham, Toai Minh', 14],
    ['Schlechter, Fridrich Richard Rudolf', 35],
    ['Wagner, Warren L. & Wagner, Anthony J. & Lorence, David H.', 11],
    ['Weber, Anton & Wei, Yi-Gang & Puglisi, Carmen & Wen, Fang', 17],
    ['Wen, Fang & Wei, Yi-Gang', 6],
    ['Xu, Wei-Bin & Zhang, Qiang & Wen, Fang & Liao, Wen-Bo & Pan, Bo', 10],
    ['Other (149)', 214]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=452)',
    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);