function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Ashmead, William Harris', 1],
    ['Ebrahimi, E. & Schmid, C. & Wahis, R.', 3],
    ['Egger, Christian Schmid- & Liebig, Wolf-Harald', 1],
    ['Else, George R. & Bolton, Barry & Broad, Gavin R.', 6],
    ['Enayatnia, Masoumeh & Rakhshani, Ehsan & Kroupa, Alexander S.', 16],
    ['Gadallah, Neveen S. & Schmid-Egger, Christian', 13],
    ['John M. Leavengood, Jr. & Waichert, Cecilia & Rodriguez, Juanita', 1],
    ['Kurczewski, Frank E. & West, Rick C. & Waichert, Cecilia', 4],
    ['Loktionov, V. M.', 1],
    ['Loktionov, Valery M.', 2],
    ['Madl, Michael & P, Cryptocheilus & D, Cyphononyx', 2],
    ['Schmid-Egger, Christian & Kaplan, Emin & Yildirim, Erol', 1],
    ['Verheyde, Fons & Jacobs, JEffrEY & Dekoninck, WOUTEr', 2],
    ['Waichert, Cecilia & Rodriguez, Juanita & Pitts, James P.', 1],
    ['Wolf, H. & D-R', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=56)',
    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);