function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Callmander, Martin W. & Durbin, Olivier D. & Lack, Hans-Walter', 1],
    ['Hess, Hans Ernst & Landolt, Elias & Hirzel, Rosmarie', 8],
    ['Info Flora', 8],
    ['Jarvis, Charlie', 6],
    ['Kljuykov, Eugene & Lyskov, Dmitry & Ukrainskaja, Uliana', 2],
    ['Konrad Lauber & Gerhart Wagner & Andreas Gygax', 7],
    ['Linnaeus, Carolus', 5],
    ['Nandikar, Mayur D. & Sardesai, Milind M.', 1],
    ['Novikov, Andriy', 2],
    ['Tabad, Mohammad Aref & Maroofi, Hosein & Rastegar, Azad', 1],
    ['Zhou, Ya-Dong & Mwachala, Geoffrey & Hu, Guang-Wan', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=43)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 11, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);