function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Becherer', 2],
    ['Cabezudo, Baltasar & Solanas, Federico Casimiro-Soriguer', 10],
    ['Castillón, Eduardo Estrada & Quintanilla, José Ángel Villarreal', 136],
    ['Castillón, Eduardo Estrada & Rebman, Jon P. & González, Carlos', 3],
    ['Ghahremaninejad, Farrokh & Joharchi, Mohammad Reza', 2],
    ['Hess, Hans Ernst & Landolt, Elias & Hirzel, Rosmarie', 18],
    ['Info Flora', 19],
    ['Jarvis, Charlie', 44],
    ['Khan, Amjad & Sultan, Amir & Zarre, Shahin & Ishaq, Kamran', 2],
    ['Konrad Lauber & Gerhart Wagner & Andreas Gygax', 12],
    ['Punjani, Bhasker & Patel, Suresh & Desai, Prashant', 3],
    ['Ranjbar, Massoud', 2],
    ['Reich, Dieter & Gutermann, Walter & Bardy, Katharina', 8],
    ['Shuka, Lulezim & Tan, Kit', 2],
    ['Sokoloff, Paul C. & Freebury, Colin E. & Hamilton, Paul B.', 6],
    ['Other (14)', 14]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=283)',
    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);