function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Chertoprud, Mikhail V. & Palatov, Dmitry M.', 1],
    ['Christoffersen, Martin L.', 1],
    ['Dole-Olivier, Marie-José & Galassi, Diana M. P. & Fiers, Frank', 1],
    ['Felföldi, Tamás & Dózsa-Farkas, Klára & Nagy, Hajnalka', 3],
    ['Klinth, Mårten J. & Rota, Emilia & Martinsson, Svante', 7],
    ['Martin, Patrick & Schmelz, Rüdiger M. & Dole-Olivier, Marie-José', 2],
    ['Rota, Emilia & Manconi, Renata', 1],
    ['Xie, Zhicai & Rota, Emilia', 4]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=20)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 8, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);