function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Barševskis, Arvīds & Janovska, Marina & Aksjuta, Kristīna', 1],
    ['Danilevsky, Mikhail L.', 6],
    ['Ilić, Nastas & Ćurčić, Srećko', 1],
    ['Lazarev, Maxim A.', 3],
    ['Slama, M.', 1],
    ['Stefanelli, Silvia & Della Rocca, Francesca & Bogliani, Giuseppe', 2],
    ['Telfer, Angela C & Young, Monica R & Quinn, Jenna & Perez, Kate', 1],
    ['Webster, Reginald & McCoqrquodale, David & Majka, Christopher', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=16)',
    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);