function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Abu-Dannoun, Omar & Katbeh-Bader, Ahmad', 1],
    ['Becherer', 15],
    ['Ghahari, H. & M. G & R, Blepharopsis & C, Empusa', 2],
    ['Hess, Hans Ernst & Landolt, Elias & Hirzel, Rosmarie', 7],
    ['Info Flora', 9],
    ['Jarvis, Charlie', 22],
    ['Konrad Lauber & Gerhart Wagner & Andreas Gygax', 7],
    ['Le Brun, P.', 2],
    ['Lee, Jong-Won & Yun, Ho-Geun & Hwang, Tae Young & Kim, Kyungmin', 2],
    ['Linnaeus, Carolus', 18],
    ['Marabuto, Eduardo', 2],
    ['Mohammad, Salwa Kamal & Alla, Sohair Mohammad Gad', 3],
    ['Reich, Dieter & Gutermann, Walter & Bardy, Katharina', 4],
    ['Thornhill, Robert & Krings, Alexander & Lindbo, David', 6],
    ['Wilson, Carol A.', 2],
    ['Other (14)', 14]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=116)',
    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);