function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Banoo, Sakina & Khuroo, Anzar Ahmad & Ganie, Aijaz Hassan', 1],
    ['DeFilipps, Robert A. & Krupnick, Gary A.', 1],
    ['Diels, Friedrich Ludwig Emil', 1],
    ['Hess, Hans Ernst & Landolt, Elias & Hirzel, Rosmarie', 2],
    ['Info Flora', 1],
    ['Islam, Tajamul & Khuroo, Anzar Ahmad & Nawchoo, Irshad A.', 1],
    ['Jarvis, Charlie', 1],
    ['Konrad Lauber & Gerhart Wagner & Andreas Gygax', 1],
    ['Lahiri, Subhajit & Dash, Sudhansu Sekhar & Maity, Rohan', 1],
    ['Li, Jiaxiang & Xu, Yongfu & Zhao, Lijuan', 1],
    ['Linnaeus, Carolus', 5],
    ['Novikov, Andriy', 1],
    ['Singh, Bikarma', 1],
    ['Wani, Bilal A. & Islam, Tajamul & Khuroo, Anzar Ahmad', 1],
    ['Zhou, Ya-Dong & Mwachala, Geoffrey & Hu, Guang-Wan', 8]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=27)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 15, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);