function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Gill, Sumbul & Rais, Muhammad & Saeed, Muhammad & Ahmed, Waseem', 1],
    ['Hofmann, Sylvia & Schmidt, Joachim & Masroor, Rafaqat', 1],
    ['Liu, Shuo & Zhang, Peisong & Rao, Dingqi', 1],
    ['O, Kyle A. & Connell & Aryal, Prakash C. & Sherchan, Adarsh M.', 1],
    ['Thongproh, Prapaiporn & Chunskul, Jidapa & Makchai, Sunchai', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=5)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 5, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);