function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Glinskiy, Vadim', 1],
    ['Glinskiy, Vadim N. & Nilov, Sergey P.', 1],
    ['Karatajūtē-Talimaa, Valentina & Märss, Tiiu', 6],
    ['Karatajūtē-Talimaa, Valentina N.', 2],
    ['Laan, Richard Van Der', 41],
    ['Mark-Kurik, Elga & Blieck, Alain & Burrow, Carole J.', 7],
    ['Märss, Tiiu & Karatajūtē-Talimaa, Valentina', 6],
    ['Pernègre, Vincent Noël', 2],
    ['Turner, Susan', 1],
    ['Žigaitė, Živile & Goujet, Daniel', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=68)',
    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);