function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bartolucci, Fabrizio & Mráz, Patrik', 2],
    ['Bartolucci, Fabrizio & Walter, Johannes', 28],
    ['Cabezudo, Baltasar & Solanas, Federico Casimiro-Soriguer', 4],
    ['Galasso, Silvia & Pacifico, Severina & Kretschmer, Nadine', 1],
    ['Hess, Hans Ernst & Landolt, Elias & Hirzel, Rosmarie', 9],
    ['Info Flora', 13],
    ['Jarvis, Charlie', 9],
    ['Jeanmonod, Daniel', 2],
    ['Konrad Lauber & Gerhart Wagner & Andreas Gygax', 9],
    ['Mokni, Ridha El & Domina, Gianniantonio', 4],
    ['Nachychko, Viktor O. & Gamulya, Yuriy G. & Sosnovsky, Yevhen V.', 3],
    ['Novikov, Andriy', 2],
    ['Peruzzi, Lorenzo & Galasso, Gabriele & Domina, Gianniantonio', 7],
    ['Reich, Dieter & Gutermann, Walter & Bardy, Katharina', 17],
    ['Saez, Llorenc & Bogunic, Faruk & Cambria, Salvatore', 5],
    ['Other (2)', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=117)',
    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);