function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Becherer', 60],
    ['Bobrov, Alexander A. & Zalewska-Gałosz, Joanna', 1],
    ['Cabezudo, Baltasar & Solanas, Federico Casimiro-Soriguer', 2],
    ['Gillespie, Lynn J. & Saarela, Jeffery M. & Sokoloff, Paul C.', 1],
    ['Hess, Hans Ernst & Landolt, Elias & Hirzel, Rosmarie', 22],
    ['Howell, Nathan & Krings, Alexander & Braham, Richard R', 4],
    ['Info Flora', 27],
    ['Ito, Yu & Barfod, Anders S.', 16],
    ['Ito, Yu & Tanaka, Nobuyuki', 2],
    ['Ito, Yu & Tanaka, Norio & Pooma, Rachun & Tanaka, Nobuyuki', 2],
    ['Jarvis, Charlie', 13],
    ['Kapitonova, Olga A.', 12],
    ['Konrad Lauber & Gerhart Wagner & Andreas Gygax', 25],
    ['Linnaeus, Carolus', 12],
    ['Wiegleb, G.', 2],
    ['Other (7)', 7]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=208)',
    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);