function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Chandler, Peter J.', 5],
    ['Harrison, Roy A.', 2],
    ['Jakovlev, Jevgeni & Salmela, Jukka & Polevoi, Alexei', 8],
    ['Kjaerandsen, Jostein', 10],
    ['Kolcsár, Levente-Péter & Salmela, Jukka', 1],
    ['Kurina, Olavi', 3],
    ['Magnussen, Trude & Kjaerandsen, Jostein & Johnsen, Arild', 6],
    ['Magnussen, Trude & Soli, Geir E. E. & Kjaerandsen, Jostein', 9],
    ['Polevoi, A. V. & Potapova, N. K.', 1],
    ['Salmela, Jukka & Kaunisto, Kari M', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=47)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 10, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);