function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bespalaya, Yulia V. & Kropotin, Alexander V.', 3],
    ['Frank, Christa', 2],
    ['Ivanova, Mariya B. & Tsurpalo, Alexandra P.', 1],
    ['Marković, Vanja & Gojšina, Vukašin & Novaković, Boris', 2],
    ['Ng, Ting Hui & Jeratthitikul, Ekgachai & Sutcharit, Chirasak', 1],
    ['Schultheiss, Roland & Ndeo, Oscar Wembo & Malikwisha, Meni', 1],
    ['Wesselingh, Frank & Poorten, Jan Johan ter & Kijashko, Pavel', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=11)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 7, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);